Auto merge of #13185 - nox:namespaces, r=jdm,Ms2ger

Make console a namespace (fixes #13010)

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This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/13185)
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13 files changed, 220 insertions, 117 deletions

diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 717fc4a4cf2..486758182d2 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -26,6 +26,7 @@ from WebIDL import (
 )
 
 from Configuration import (
+    MakeNativeName,
     MemberIsUnforgeable,
     getModuleFromObject,
     getTypesFromCallback,
@@ -80,7 +81,7 @@ def toStringBool(arg):
 
 
 def toBindingNamespace(arg):
-    return re.sub("((_workers)?$)", "Binding\\1", arg)
+    return re.sub("((_workers)?$)", "Binding\\1", MakeNativeName(arg))
 
 
 def stripTrailingWhitespace(text):
@@ -96,9 +97,6 @@ def innerSequenceType(type):
     return type.inner.inner if type.nullable() else type.inner
 
 
-def MakeNativeName(name):
-    return name[0].upper() + name[1:]
-
 builtinNames = {
     IDLType.Tags.bool: 'bool',
     IDLType.Tags.int8: 'i8',
@@ -1811,7 +1809,8 @@ class CGImports(CGWrapper):
 
         def isImportable(type):
             if not type.isType():
-                assert type.isInterface() or type.isDictionary() or type.isEnum()
+                assert (type.isInterface() or type.isDictionary() or
+                        type.isEnum() or type.isNamespace())
                 return True
             return not (type.builtin or type.isSequence() or type.isUnion())
 
@@ -1830,7 +1829,7 @@ class CGImports(CGWrapper):
                 if t.isCallback():
                     return t.callback.identifier
                 return t.identifier
-            assert t.isInterface() or t.isDictionary() or t.isEnum()
+            assert t.isInterface() or t.isDictionary() or t.isEnum() or t.isNamespace()
             return t.identifier
 
         def removeWrapperAndNullableTypes(types):
@@ -1881,7 +1880,7 @@ class CGImports(CGWrapper):
             # Importing these types in the same module that defines them is an error.
             if t in dictionaries or t in enums:
                 continue
-            if t.isInterface():
+            if t.isInterface() or t.isNamespace():
                 descriptor = descriptorProvider.getDescriptor(getIdentifier(t).name)
                 extras += [descriptor.path]
                 if descriptor.interface.parent:
@@ -2060,6 +2059,17 @@ class CGInterfaceObjectJSClass(CGThing):
         self.descriptor = descriptor
 
     def define(self):
+        if self.descriptor.interface.isNamespace():
+            classString = self.descriptor.interface.getExtendedAttribute("ClassString")
+            if classString:
+                classString = classString[0]
+            else:
+                classString = "Object"
+            return """\
+static NAMESPACE_OBJECT_CLASS: NamespaceObjectClass = unsafe {
+    NamespaceObjectClass::new(%s)
+};
+""" % str_to_const_array(classString)
         if self.descriptor.interface.ctor():
             constructorBehavior = "InterfaceConstructorBehavior::call(%s)" % CONSTRUCT_HOOK_NAME
         else:
@@ -2659,6 +2669,28 @@ class CGCreateInterfaceObjectsMethod(CGAbstractMethod):
 
     def definition_body(self):
         name = self.descriptor.interface.identifier.name
+        if self.descriptor.interface.isNamespace():
+            if self.descriptor.interface.getExtendedAttribute("ProtoObjectHack"):
+                proto = "JS_GetObjectPrototype(cx, global)"
+            else:
+                proto = "JS_NewPlainObject(cx)"
+            if self.properties.static_methods.length():
+                methods = self.properties.static_methods.variableName()
+            else:
+                methods = "&[]"
+            return CGGeneric("""\
+rooted!(in(cx) let proto = %(proto)s);
+assert!(!proto.is_null());
+rooted!(in(cx) let mut namespace = ptr::null_mut());
+create_namespace_object(cx, global, proto.handle(), &NAMESPACE_OBJECT_CLASS,
+                        %(methods)s, %(name)s, namespace.handle_mut());
+assert!(!namespace.is_null());
+assert!((*cache)[PrototypeList::Constructor::%(id)s as usize].is_null());
+(*cache)[PrototypeList::Constructor::%(id)s as usize] = namespace.get();
+<*mut JSObject>::post_barrier((*cache).as_mut_ptr().offset(PrototypeList::Constructor::%(id)s as isize),
+                              ptr::null_mut(),
+                              namespace.get());
+""" % {"id": MakeNativeName(name), "methods": methods, "name": str_to_const_array(name), "proto": proto})
         if self.descriptor.interface.isCallback():
             assert not self.descriptor.interface.ctor() and self.descriptor.interface.hasConstants()
             return CGGeneric("""\
@@ -2873,7 +2905,7 @@ class CGGetPerInterfaceObject(CGAbstractMethod):
                 Argument('MutableHandleObject', 'rval')]
         CGAbstractMethod.__init__(self, descriptor, name,
                                   'void', args, pub=pub, unsafe=True)
-        self.id = idPrefix + "::" + self.descriptor.name
+        self.id = idPrefix + "::" + MakeNativeName(self.descriptor.name)
 
     def definition_body(self):
         return CGGeneric("""
@@ -3016,7 +3048,7 @@ class CGDefineDOMInterfaceMethod(CGAbstractMethod):
         return CGAbstractMethod.define(self)
 
     def definition_body(self):
-        if self.descriptor.interface.isCallback():
+        if self.descriptor.interface.isCallback() or self.descriptor.interface.isNamespace():
             function = "GetConstructorObject"
         else:
             function = "GetProtoObject"
@@ -3047,7 +3079,7 @@ class CGCallGenerator(CGThing):
     exception from the native code, or None if no error reporting is needed.
     """
     def __init__(self, errorResult, arguments, argsPre, returnType,
-                 extendedAttributes, descriptorProvider, nativeMethodName,
+                 extendedAttributes, descriptor, nativeMethodName,
                  static, object="this"):
         CGThing.__init__(self)
 
@@ -3055,7 +3087,7 @@ class CGCallGenerator(CGThing):
 
         isFallible = errorResult is not None
 
-        result = getRetvalDeclarationForType(returnType, descriptorProvider)
+        result = getRetvalDeclarationForType(returnType, descriptor)
         if isFallible:
             result = CGWrapper(result, pre="Result<", post=", Error>")
 
@@ -3076,7 +3108,7 @@ class CGCallGenerator(CGThing):
 
         call = CGGeneric(nativeMethodName)
         if static:
-            call = CGWrapper(call, pre="%s::" % descriptorProvider.interface.identifier.name)
+            call = CGWrapper(call, pre="%s::" % MakeNativeName(descriptor.interface.identifier.name))
         else:
             call = CGWrapper(call, pre="%s." % object)
         call = CGList([call, CGWrapper(args, pre="(", post=")")])
@@ -5454,6 +5486,8 @@ def generate_imports(config, cgthings, descriptors, callbacks=None, dictionaries
         'dom::bindings::js::OptionalRootedReference',
         'dom::bindings::js::Root',
         'dom::bindings::js::RootedReference',
+        'dom::bindings::namespace::NamespaceObjectClass',
+        'dom::bindings::namespace::create_namespace_object',
         'dom::bindings::reflector::MutReflectable',
         'dom::bindings::reflector::Reflectable',
         'dom::bindings::utils::DOMClass',
@@ -5561,7 +5595,7 @@ class CGDescriptor(CGThing):
             return name
 
         cgThings = []
-        if not descriptor.interface.isCallback():
+        if not descriptor.interface.isCallback() and not descriptor.interface.isNamespace():
             cgThings.append(CGGetProtoObjectMethod(descriptor))
             reexports.append('GetProtoObject')
         if (descriptor.interface.hasInterfaceObject() and
@@ -5622,7 +5656,7 @@ class CGDescriptor(CGThing):
             if not descriptor.interface.isCallback():
                 cgThings.append(CGInterfaceObjectJSClass(descriptor))
 
-        if not descriptor.interface.isCallback():
+        if not descriptor.interface.isCallback() and not descriptor.interface.isNamespace():
             cgThings.append(CGPrototypeJSClass(descriptor))
 
         # If there are no constant members, don't make a module for constants
@@ -5679,7 +5713,7 @@ class CGDescriptor(CGThing):
             reexports.append('Wrap')
 
         haveUnscopables = False
-        if not descriptor.interface.isCallback():
+        if not descriptor.interface.isCallback() and not descriptor.interface.isNamespace():
             if unscopableNames:
                 haveUnscopables = True
                 cgThings.append(
@@ -5706,7 +5740,7 @@ class CGDescriptor(CGThing):
                                          cgThings, public=True),
                              post='\n')
         reexports = ', '.join(map(lambda name: reexportedName(name), reexports))
-        self.cgRoot = CGList([CGGeneric('pub use self::%sBinding::{%s};' % (descriptor.name, reexports)),
+        self.cgRoot = CGList([CGGeneric('pub use self::%s::{%s};' % (toBindingNamespace(descriptor.name), reexports)),
                               cgThings], '\n')
 
     def define(self):
@@ -6760,10 +6794,12 @@ class GlobalGenRoots():
     @staticmethod
     def PrototypeList(config):
         # Prototype ID enum.
-        interfaces = config.getDescriptors(isCallback=False)
+        interfaces = config.getDescriptors(isCallback=False, isNamespace=False)
         protos = [d.name for d in interfaces]
-        constructors = [d.name for d in config.getDescriptors(hasInterfaceObject=True)
-                        if d.shouldHaveGetConstructorObjectMethod()]
+        constructors = sorted([MakeNativeName(d.name)
+                               for d in config.getDescriptors(hasInterfaceObject=True)
+                               if d.shouldHaveGetConstructorObjectMethod()])
+
         proxies = [d.name for d in config.getDescriptors(proxy=True)]
 
         return CGList([
@@ -6800,10 +6836,13 @@ class GlobalGenRoots():
 
     @staticmethod
     def InterfaceTypes(config):
-        descriptors = [d.name for d in config.getDescriptors(register=True,
+        descriptors = sorted([MakeNativeName(d.name)
+                              for d in config.getDescriptors(register=True,
                                                              isCallback=False,
-                                                             isIteratorInterface=False)]
-        curr = CGList([CGGeneric("pub use dom::%s::%s;\n" % (name.lower(), name)) for name in descriptors])
+                                                             isIteratorInterface=False)])
+        curr = CGList([CGGeneric("pub use dom::%s::%s;\n" % (name.lower(),
+                                                             MakeNativeName(name)))
+                       for name in descriptors])
         curr = CGWrapper(curr, pre=AUTOGENERATED_WARNING_COMMENT)
         return curr
 
@@ -6814,7 +6853,7 @@ class GlobalGenRoots():
             return getModuleFromObject(d).split('::')[-1]
 
         descriptors = config.getDescriptors(register=True, isIteratorInterface=False)
-        descriptors = (set(d.name + "Binding" for d in descriptors) |
+        descriptors = (set(toBindingNamespace(d.name) for d in descriptors) |
                        set(leafModule(d) for d in config.callbacks) |
                        set(leafModule(d) for d in config.getDictionaries()))
         curr = CGList([CGGeneric("pub mod %s;\n" % name) for name in sorted(descriptors)])
diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index c8f92472618..6e71bd4bd00 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -4,7 +4,7 @@
 
 import os
 
-from WebIDL import IDLExternalInterface, IDLInterface, IDLWrapperType, WebIDLError
+from WebIDL import IDLExternalInterface, IDLWrapperType, WebIDLError
 
 
 class Configuration:
@@ -30,10 +30,9 @@ class Configuration:
                 raise WebIDLError("Servo does not support external interfaces.",
                                   [thing.location])
 
-            # Some toplevel things are sadly types, and those have an
-            # isInterface that doesn't mean the same thing as IDLObject's
-            # isInterface()...
-            if not isinstance(thing, IDLInterface):
+            assert not thing.isType()
+
+            if not thing.isInterface() and not thing.isNamespace():
                 continue
 
             iface = thing
@@ -83,6 +82,8 @@ class Configuration:
                 getter = lambda x: x.interface.hasInterfaceObject()
             elif key == 'isCallback':
                 getter = lambda x: x.interface.isCallback()
+            elif key == 'isNamespace':
+                getter = lambda x: x.interface.isNamespace()
             elif key == 'isJSImplemented':
                 getter = lambda x: x.interface.isJSImplemented()
             elif key == 'isGlobal':
@@ -210,7 +211,7 @@ class Descriptor(DescriptorProvider):
             if self.interface.isIteratorInterface():
                 pathDefault = 'dom::bindings::iterable::IterableIterator'
             else:
-                pathDefault = 'dom::types::%s' % typeName
+                pathDefault = 'dom::types::%s' % MakeNativeName(typeName)
 
         self.concreteType = typeName
         self.register = desc.get('register', True)
@@ -223,6 +224,7 @@ class Descriptor(DescriptorProvider):
         # If we're concrete, we need to crawl our ancestor interfaces and mark
         # them as having a concrete descendant.
         self.concrete = (not self.interface.isCallback() and
+                         not self.interface.isNamespace() and
                          not self.interface.getExtendedAttribute("Abstract"))
         self.hasUnforgeableMembers = (self.concrete and
                                       any(MemberIsUnforgeable(m, self) for m in
@@ -381,7 +383,7 @@ class Descriptor(DescriptorProvider):
 
     def shouldHaveGetConstructorObjectMethod(self):
         assert self.interface.hasInterfaceObject()
-        return self.interface.isCallback() or self.hasDescendants()
+        return self.interface.isCallback() or self.interface.isNamespace() or self.hasDescendants()
 
     def isExposedConditionally(self):
         return self.interface.isExposedConditionally()
@@ -396,6 +398,12 @@ class Descriptor(DescriptorProvider):
 
 
 # Some utility methods
+
+
+def MakeNativeName(name):
+    return name[0].upper() + name[1:]
+
+
 def getModuleFromObject(object):
     return ('dom::bindings::codegen::Bindings::' +
             os.path.basename(object.location.filename()).split('.webidl')[0] + 'Binding')
diff --git a/components/script/dom/bindings/global.rs b/components/script/dom/bindings/global.rs
index dd03554217d..a5c9d1a3d79 100644
--- a/components/script/dom/bindings/global.rs
+++ b/components/script/dom/bindings/global.rs
@@ -13,6 +13,7 @@ use dom::bindings::conversions::root_from_object;
 use dom::bindings::error::ErrorInfo;
 use dom::bindings::js::Root;
 use dom::bindings::reflector::{Reflectable, Reflector};
+use dom::console::TimerSet;
 use dom::window::{self, ScriptHelpers};
 use dom::workerglobalscope::WorkerGlobalScope;
 use ipc_channel::ipc::IpcSender;
@@ -271,6 +272,14 @@ impl<'a> GlobalRef<'a> {
         }
     }
 
+    /// Returns the global's timers for the Console API.
+    pub fn console_timers(&self) -> &TimerSet {
+        match *self {
+            GlobalRef::Window(ref window) => window.console_timers(),
+            GlobalRef::Worker(ref worker) => worker.console_timers(),
+        }
+    }
+
     /// Returns a wrapper for runnables to ensure they are cancelled if the global
     /// is being destroyed.
     pub fn get_runnable_wrapper(&self) -> RunnableWrapper {
diff --git a/components/script/dom/bindings/interface.rs b/components/script/dom/bindings/interface.rs
index f7786163cc5..cae5da97887 100644
--- a/components/script/dom/bindings/interface.rs
+++ b/components/script/dom/bindings/interface.rs
@@ -257,7 +257,8 @@ pub unsafe fn create_named_constructors(
     }
 }
 
-unsafe fn create_object(
+/// Create a new object with a unique type.
+pub unsafe fn create_object(
         cx: *mut JSContext,
         proto: HandleObject,
         class: &'static JSClass,
@@ -316,7 +317,9 @@ pub unsafe fn is_exposed_in(object: HandleObject, globals: Globals) -> bool {
     globals.contains(dom_class.global)
 }
 
-unsafe fn define_on_global_object(
+/// Define a property with a given name on the global object. Should be called
+/// through the resolve hook.
+pub unsafe fn define_on_global_object(
         cx: *mut JSContext,
         global: HandleObject,
         name: &[u8],
diff --git a/components/script/dom/bindings/mod.rs b/components/script/dom/bindings/mod.rs
index 8aefc71d577..16607c9045f 100644
--- a/components/script/dom/bindings/mod.rs
+++ b/components/script/dom/bindings/mod.rs
@@ -140,6 +140,7 @@ pub mod inheritance;
 pub mod interface;
 pub mod iterable;
 pub mod js;
+pub mod namespace;
 pub mod num;
 pub mod proxyhandler;
 pub mod refcounted;
diff --git a/components/script/dom/bindings/namespace.rs b/components/script/dom/bindings/namespace.rs
new file mode 100644
index 00000000000..38055dea180
--- /dev/null
+++ b/components/script/dom/bindings/namespace.rs
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//! Machinery to initialise namespace objects.
+
+use dom::bindings::guard::Guard;
+use dom::bindings::interface::{create_object, define_on_global_object};
+use js::jsapi::{HandleObject, JSClass, JSContext, JSFunctionSpec, MutableHandleObject};
+use libc;
+use std::ptr;
+
+/// The class of a namespace object.
+#[derive(Copy, Clone)]
+pub struct NamespaceObjectClass(JSClass);
+
+unsafe impl Sync for NamespaceObjectClass {}
+
+impl NamespaceObjectClass {
+    /// Create a new `NamespaceObjectClass` structure.
+    pub const unsafe fn new(name: &'static [u8]) -> Self {
+        NamespaceObjectClass(JSClass {
+            name: name as *const _ as *const libc::c_char,
+            flags: 0,
+            cOps: ptr::null_mut(),
+            reserved: [ptr::null_mut(); 3],
+        })
+    }
+}
+
+/// Create a new namespace object.
+pub unsafe fn create_namespace_object(
+        cx: *mut JSContext,
+        global: HandleObject,
+        proto: HandleObject,
+        class: &'static NamespaceObjectClass,
+        methods: &[Guard<&'static [JSFunctionSpec]>],
+        name: &[u8],
+        rval: MutableHandleObject) {
+    create_object(cx, proto, &class.0, methods, &[], &[], rval);
+    define_on_global_object(cx, global, name, rval.handle());
+}
diff --git a/components/script/dom/bindings/str.rs b/components/script/dom/bindings/str.rs
index c73a08d182b..2e28a1b314e 100644
--- a/components/script/dom/bindings/str.rs
+++ b/components/script/dom/bindings/str.rs
@@ -5,7 +5,7 @@
 //! The `ByteString` struct.
 
 use std::ascii::AsciiExt;
-use std::borrow::{ToOwned, Cow};
+use std::borrow::{Borrow, Cow, ToOwned};
 use std::fmt;
 use std::hash::{Hash, Hasher};
 use std::ops;
@@ -180,6 +180,13 @@ impl DOMString {
     }
 }
 
+impl Borrow<str> for DOMString {
+    #[inline]
+    fn borrow(&self) -> &str {
+        &self.0
+    }
+}
+
 impl Default for DOMString {
     fn default() -> Self {
         DOMString(String::new())
diff --git a/components/script/dom/console.rs b/components/script/dom/console.rs
index 9382bf936a8..37d549befd9 100644
--- a/components/script/dom/console.rs
+++ b/components/script/dom/console.rs
@@ -4,39 +4,17 @@
 
 use devtools_traits::{ConsoleMessage, LogLevel, ScriptToDevtoolsControlMsg};
 use dom::bindings::cell::DOMRefCell;
-use dom::bindings::codegen::Bindings::ConsoleBinding;
-use dom::bindings::codegen::Bindings::ConsoleBinding::ConsoleMethods;
 use dom::bindings::global::GlobalRef;
-use dom::bindings::js::Root;
-use dom::bindings::reflector::{Reflectable, Reflector, reflect_dom_object};
 use dom::bindings::str::DOMString;
 use std::collections::HashMap;
+use std::collections::hash_map::Entry;
 use time::{Timespec, get_time};
 
 // https://developer.mozilla.org/en-US/docs/Web/API/Console
-#[dom_struct]
-pub struct Console {
-    reflector_: Reflector,
-    timers: DOMRefCell<HashMap<DOMString, u64>>,
-}
+pub struct Console(());
 
 impl Console {
-    fn new_inherited() -> Console {
-        Console {
-            reflector_: Reflector::new(),
-            timers: DOMRefCell::new(HashMap::new()),
-        }
-    }
-
-    pub fn new(global: GlobalRef) -> Root<Console> {
-        reflect_dom_object(box Console::new_inherited(),
-                           global,
-                           ConsoleBinding::Wrap)
-    }
-
-    fn send_to_devtools(&self, level: LogLevel, message: DOMString) {
-        let global = self.global();
-        let global = global.r();
+    fn send_to_devtools(global: GlobalRef, level: LogLevel, message: DOMString) {
         if let Some(chan) = global.devtools_chan() {
             let console_message = prepare_message(level, message);
             let devtools_message = ScriptToDevtoolsControlMsg::ConsoleAPI(
@@ -48,83 +26,73 @@ impl Console {
     }
 }
 
-impl ConsoleMethods for Console {
+impl Console {
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/log
-    fn Log(&self, messages: Vec<DOMString>) {
+    pub fn Log(global: GlobalRef, messages: Vec<DOMString>) {
         for message in messages {
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Log, message);
+            Self::send_to_devtools(global, LogLevel::Log, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console
-    fn Debug(&self, messages: Vec<DOMString>) {
+    pub fn Debug(global: GlobalRef, messages: Vec<DOMString>) {
         for message in messages {
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Debug, message);
+            Self::send_to_devtools(global, LogLevel::Debug, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/info
-    fn Info(&self, messages: Vec<DOMString>) {
+    pub fn Info(global: GlobalRef, messages: Vec<DOMString>) {
         for message in messages {
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Info, message);
+            Self::send_to_devtools(global, LogLevel::Info, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/warn
-    fn Warn(&self, messages: Vec<DOMString>) {
+    pub fn Warn(global: GlobalRef, messages: Vec<DOMString>) {
         for message in messages {
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Warn, message);
+            Self::send_to_devtools(global, LogLevel::Warn, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/error
-    fn Error(&self, messages: Vec<DOMString>) {
+    pub fn Error(global: GlobalRef, messages: Vec<DOMString>) {
         for message in messages {
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Error, message);
+            Self::send_to_devtools(global, LogLevel::Error, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/assert
-    fn Assert(&self, condition: bool, message: Option<DOMString>) {
+    pub fn Assert(global: GlobalRef, condition: bool, message: Option<DOMString>) {
         if !condition {
             let message = message.unwrap_or_else(|| DOMString::from("no message"));
             println!("Assertion failed: {}", message);
-            self.send_to_devtools(LogLevel::Error, message);
+            Self::send_to_devtools(global, LogLevel::Error, message);
         }
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/time
-    fn Time(&self, label: DOMString) {
-        let mut timers = self.timers.borrow_mut();
-        if timers.contains_key(&label) {
-            // Timer already started
-            return;
-        }
-        if timers.len() >= 10000 {
-            // Too many timers on page
-            return;
+    pub fn Time(global: GlobalRef, label: DOMString) {
+        if let Ok(()) = global.console_timers().time(label.clone()) {
+            let message = DOMString::from(format!("{}: timer started", label));
+            println!("{}", message);
+            Self::send_to_devtools(global, LogLevel::Log, message);
         }
-
-        timers.insert(label.clone(), timestamp_in_ms(get_time()));
-        let message = DOMString::from(format!("{}: timer started", label));
-        println!("{}", message);
-        self.send_to_devtools(LogLevel::Log, message);
     }
 
     // https://developer.mozilla.org/en-US/docs/Web/API/Console/timeEnd
-    fn TimeEnd(&self, label: DOMString) {
-        let mut timers = self.timers.borrow_mut();
-        if let Some(start) = timers.remove(&label) {
+    pub fn TimeEnd(global: GlobalRef, label: DOMString) {
+        if let Ok(delta) = global.console_timers().time_end(&label) {
             let message = DOMString::from(
-                format!("{}: {}ms", label, timestamp_in_ms(get_time()) - start)
+                format!("{}: {}ms", label, delta)
             );
             println!("{}", message);
-            self.send_to_devtools(LogLevel::Log, message);
+            Self::send_to_devtools(global, LogLevel::Log, message);
         };
     }
 }
@@ -143,3 +111,32 @@ fn prepare_message(logLevel: LogLevel, message: DOMString) -> ConsoleMessage {
         columnNumber: 1,
     }
 }
+
+#[derive(HeapSizeOf, JSTraceable)]
+pub struct TimerSet(DOMRefCell<HashMap<DOMString, u64>>);
+
+impl TimerSet {
+    pub fn new() -> Self {
+        TimerSet(DOMRefCell::new(Default::default()))
+    }
+
+    fn time(&self, label: DOMString) -> Result<(), ()> {
+        let mut timers = self.0.borrow_mut();
+        if timers.len() >= 10000 {
+            return Err(());
+        }
+        match timers.entry(label) {
+            Entry::Vacant(entry) => {
+                entry.insert(timestamp_in_ms(get_time()));
+                Ok(())
+            },
+            Entry::Occupied(_) => Err(()),
+        }
+    }
+
+    fn time_end(&self, label: &str) -> Result<u64, ()> {
+        self.0.borrow_mut().remove(label).ok_or(()).map(|start| {
+            timestamp_in_ms(get_time()) - start
+        })
+    }
+}
diff --git a/components/script/dom/webidls/Console.webidl b/components/script/dom/webidls/Console.webidl
index 09273db78b8..90f9bb9f58e 100644
--- a/components/script/dom/webidls/Console.webidl
+++ b/components/script/dom/webidls/Console.webidl
@@ -9,8 +9,10 @@
  * © Copyright 2014 Mozilla Foundation.
  */
 
-[Exposed=(Window,Worker)]
-interface Console {
+[ClassString="Console",
+ Exposed=(Window,Worker),
+ ProtoObjectHack]
+namespace console {
   // These should be DOMString message, DOMString message2, ...
   void log(DOMString... messages);
   void debug(DOMString... messages);
diff --git a/components/script/dom/webidls/Window.webidl b/components/script/dom/webidls/Window.webidl
index dcf79a61c7e..dbe73ca4831 100644
--- a/components/script/dom/webidls/Window.webidl
+++ b/components/script/dom/webidls/Window.webidl
@@ -161,7 +161,6 @@ partial interface Window {
 
 // Proprietary extensions.
 partial interface Window {
-  readonly attribute Console console;
   void debug(DOMString arg);
   void gc();
   void trap();
diff --git a/components/script/dom/webidls/WorkerGlobalScope.webidl b/components/script/dom/webidls/WorkerGlobalScope.webidl
index cc9fb292cd3..186e5cd7fee 100644
--- a/components/script/dom/webidls/WorkerGlobalScope.webidl
+++ b/components/script/dom/webidls/WorkerGlobalScope.webidl
@@ -24,10 +24,3 @@ partial interface WorkerGlobalScope { // not obsolete
 };
 WorkerGlobalScope implements WindowTimers;
 WorkerGlobalScope implements WindowBase64;
-
-// Proprietary
-[Exposed=Worker]
-partial interface WorkerGlobalScope {
-  [Replaceable]
-  readonly attribute Console console;
-};
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 4954f7cccd0..e8006123360 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -25,7 +25,7 @@ use dom::bindings::str::DOMString;
 use dom::bindings::structuredclone::StructuredCloneData;
 use dom::bindings::utils::{GlobalStaticData, WindowProxyHandler};
 use dom::browsingcontext::BrowsingContext;
-use dom::console::Console;
+use dom::console::TimerSet;
 use dom::crypto::Crypto;
 use dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration};
 use dom::document::Document;
@@ -157,7 +157,6 @@ pub struct Window {
     history_traversal_task_source: HistoryTraversalTaskSource,
     #[ignore_heap_size_of = "task sources are hard"]
     file_reading_task_source: FileReadingTaskSource,
-    console: MutNullableHeap<JS<Console>>,
     crypto: MutNullableHeap<JS<Crypto>>,
     navigator: MutNullableHeap<JS<Navigator>>,
     #[ignore_heap_size_of = "channels are hard"]
@@ -276,7 +275,10 @@ pub struct Window {
     scroll_offsets: DOMRefCell<HashMap<UntrustedNodeAddress, Point2D<f32>>>,
 
     /// https://html.spec.whatwg.org/multipage/#in-error-reporting-mode
-    in_error_reporting_mode: Cell<bool>
+    in_error_reporting_mode: Cell<bool>,
+
+    /// Timers used by the Console API.
+    console_timers: TimerSet,
 }
 
 impl Window {
@@ -508,11 +510,6 @@ impl WindowMethods for Window {
         self.local_storage.or_init(|| Storage::new(&GlobalRef::Window(self), StorageType::Local))
     }
 
-    // https://developer.mozilla.org/en-US/docs/Web/API/Console
-    fn Console(&self) -> Root<Console> {
-        self.console.or_init(|| Console::new(GlobalRef::Window(self)))
-    }
-
     // https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#dfn-GlobalCrypto
     fn Crypto(&self) -> Root<Crypto> {
         self.crypto.or_init(|| Crypto::new(GlobalRef::Window(self)))
@@ -1701,7 +1698,6 @@ impl Window {
             history_traversal_task_source: history_task_source,
             file_reading_task_source: file_task_source,
             image_cache_chan: image_cache_chan,
-            console: Default::default(),
             crypto: Default::default(),
             navigator: Default::default(),
             image_cache_thread: image_cache_thread,
@@ -1747,10 +1743,16 @@ impl Window {
             error_reporter: error_reporter,
             scroll_offsets: DOMRefCell::new(HashMap::new()),
             in_error_reporting_mode: Cell::new(false),
+            console_timers: TimerSet::new(),
         };
 
         WindowBinding::Wrap(runtime.cx(), win)
     }
+
+    pub fn console_timers(&self) -> &TimerSet {
+        &self.console_timers
+    }
+
     pub fn live_devtools_updates(&self) -> bool {
         return self.devtools_wants_updates.get();
     }
diff --git a/components/script/dom/workerglobalscope.rs b/components/script/dom/workerglobalscope.rs
index d60ddb84f88..1c2c46fb52d 100644
--- a/components/script/dom/workerglobalscope.rs
+++ b/components/script/dom/workerglobalscope.rs
@@ -12,7 +12,7 @@ use dom::bindings::inheritance::Castable;
 use dom::bindings::js::{JS, MutNullableHeap, Root};
 use dom::bindings::reflector::Reflectable;
 use dom::bindings::str::DOMString;
-use dom::console::Console;
+use dom::console::TimerSet;
 use dom::crypto::Crypto;
 use dom::dedicatedworkerglobalscope::DedicatedWorkerGlobalScope;
 use dom::eventtarget::EventTarget;
@@ -80,7 +80,6 @@ pub struct WorkerGlobalScope {
     resource_threads: ResourceThreads,
     location: MutNullableHeap<JS<WorkerLocation>>,
     navigator: MutNullableHeap<JS<WorkerNavigator>>,
-    console: MutNullableHeap<JS<Console>>,
     crypto: MutNullableHeap<JS<Crypto>>,
     timers: OneshotTimers,
 
@@ -110,6 +109,9 @@ pub struct WorkerGlobalScope {
 
     #[ignore_heap_size_of = "Defined in std"]
     scheduler_chan: IpcSender<TimerEventRequest>,
+
+    /// Timers used by the Console API.
+    console_timers: TimerSet,
 }
 
 impl WorkerGlobalScope {
@@ -130,7 +132,6 @@ impl WorkerGlobalScope {
             resource_threads: init.resource_threads,
             location: Default::default(),
             navigator: Default::default(),
-            console: Default::default(),
             crypto: Default::default(),
             timers: OneshotTimers::new(timer_event_chan, init.scheduler_chan.clone()),
             mem_profiler_chan: init.mem_profiler_chan,
@@ -141,9 +142,14 @@ impl WorkerGlobalScope {
             devtools_wants_updates: Cell::new(false),
             constellation_chan: init.constellation_chan,
             scheduler_chan: init.scheduler_chan,
+            console_timers: TimerSet::new(),
         }
     }
 
+    pub fn console_timers(&self) -> &TimerSet {
+        &self.console_timers
+    }
+
     pub fn mem_profiler_chan(&self) -> &mem::ProfilerChan {
         &self.mem_profiler_chan
     }
@@ -299,11 +305,6 @@ impl WorkerGlobalScopeMethods for WorkerGlobalScope {
         self.navigator.or_init(|| WorkerNavigator::new(self))
     }
 
-    // https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/console
-    fn Console(&self) -> Root<Console> {
-        self.console.or_init(|| Console::new(GlobalRef::Worker(self)))
-    }
-
     // https://html.spec.whatwg.org/multipage/#dfn-Crypto
     fn Crypto(&self) -> Root<Crypto> {
         self.crypto.or_init(|| Crypto::new(GlobalRef::Worker(self)))