Auto merge of #11727 - creativcoder:swmanager, r=jdm

Integrate service worker manager thread

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---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes are part of #11091

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- [X] There are tests for these changes at my [gh-pages](https://github.com/creativcoder/gsoc16/tree/gh-pages) branch to test  the instantiation of service workers by their manager, but will need to discuss how that would integrate into master.

Changes:
- Introduces a `ServiceWorkerManager`, which maintains an map of registered service workers as well as a map of active workers keyed by their `scope_url`.
- Adds the initialization of ServiceWorkerManager, at the `script::init()`, which makes it available as a single entity listening for requests from different script threads.
- Adds a timeout thread in `serviceworkerglobalscope`, which terminates the workers, after a timeout of 60 secs, thereby removing it from the active workers list.
- Adds the matching of scope urls, in longest prefix way rather than path structural way, according to [spec](https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#scope-match-algorithm).
- Make ServiceWorkerManager, the holder of network sender, instead of script thread, so it can send `CustomResponse`.

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1 files changed, 17 insertions, 9 deletions

diff --git a/components/script/dom/worker.rs b/components/script/dom/worker.rs
index 2cf1d1c4e46..c318672fb7a 100644
--- a/components/script/dom/worker.rs
+++ b/components/script/dom/worker.rs
@@ -2,9 +2,9 @@
  * 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/. */
 
-
+use devtools_traits::{ScriptToDevtoolsControlMsg, DevtoolsPageInfo};
+use dom::abstractworker::WorkerScriptMsg;
 use dom::abstractworker::{SimpleWorkerErrorHandler, SharedRt, WorkerErrorHandler};
-use dom::abstractworker::{WorkerScriptLoadOrigin, WorkerScriptMsg};
 use dom::bindings::codegen::Bindings::EventHandlerBinding::EventHandlerNonNull;
 use dom::bindings::codegen::Bindings::WorkerBinding;
 use dom::bindings::codegen::Bindings::WorkerBinding::WorkerMethods;
@@ -26,6 +26,7 @@ use ipc_channel::ipc;
 use js::jsapi::{HandleValue, JSContext, JSAutoCompartment};
 use js::jsval::UndefinedValue;
 use script_thread::Runnable;
+use script_traits::WorkerScriptLoadOrigin;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::{Sender, channel};
 use std::sync::{Arc, Mutex};
@@ -81,21 +82,28 @@ impl Worker {
         let worker_load_origin = WorkerScriptLoadOrigin {
             referrer_url: None,
             referrer_policy: None,
-            request_source: global.request_source(),
             pipeline_id: Some(global.pipeline())
         };
 
         let (devtools_sender, devtools_receiver) = ipc::channel().unwrap();
+        let worker_id = global.get_next_worker_id();
+        if let Some(ref chan) = global.devtools_chan() {
+            let pipeline_id = global.pipeline();
+                let title = format!("Worker for {}", worker_url);
+                let page_info = DevtoolsPageInfo {
+                    title: title,
+                    url: worker_url.clone(),
+                };
+                let _ = chan.send(ScriptToDevtoolsControlMsg::NewGlobal((pipeline_id, Some(worker_id)),
+                                                                devtools_sender.clone(),
+                                                                page_info));
+        }
 
-        let init = prepare_workerscope_init(global,
-            "Worker".to_owned(),
-            worker_url.clone(),
-            devtools_sender.clone(),
-            closing);
+        let init = prepare_workerscope_init(global, Some(devtools_sender));
 
         DedicatedWorkerGlobalScope::run_worker_scope(
             init, worker_url, global.pipeline(), devtools_receiver, worker.runtime.clone(), worker_ref,
-            global.script_chan(), sender, receiver, worker_load_origin);
+            global.script_chan(), sender, receiver, worker_load_origin, closing);
 
         Ok(worker)
     }