Remove doublepointer in VirtualMethods, and from_borrowed_ref

Most of the heavy lifting done by:

```
$ ls *rs | xargs gawk -i inplace '/let .*: &&.*from_borrowed_ref/{sub("&&", "\\&");sub("_borrowed_","_");} {print $0}'
$ ls *rs | xargs gawk -i inplace "/impl.*VirtualMethods/{in_vm=1; sub(/<'a>/,\"\");sub(/&'a /,\"\")} /^}\$/{in_vm=0;} in_vm{\$0=gensub(/\\*self([^.])/,\"self\\\1\",\"g\"); sub(/from_borrowed_ref/,\"from_ref\")} {print}"
```

1 files changed, 30 insertions, 30 deletions

diff --git a/components/script/dom/virtualmethods.rs b/components/script/dom/virtualmethods.rs
index 22f33d63201..86dd2312084 100644
--- a/components/script/dom/virtualmethods.rs
+++ b/components/script/dom/virtualmethods.rs
@@ -126,126 +126,126 @@ pub trait VirtualMethods {
 /// method call on the trait object will invoke the corresponding method on the
 /// concrete type, propagating up the parent hierarchy unless otherwise
 /// interrupted.
-pub fn vtable_for<'a>(node: &'a &'a Node) -> &'a (VirtualMethods + 'a) {
+pub fn vtable_for<'a>(node: &'a Node) -> &'a (VirtualMethods + 'a) {
     match node.type_id() {
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAnchorElement)) => {
-            let element = HTMLAnchorElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLAnchorElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAppletElement)) => {
-            HTMLAppletElementCast::to_borrowed_ref(node).unwrap() as &'a (VirtualMethods + 'a)
+            HTMLAppletElementCast::to_ref(node).unwrap() as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAreaElement)) => {
-            let element = HTMLAreaElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLAreaElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLBaseElement)) => {
-            let element = HTMLBaseElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLBaseElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLBodyElement)) => {
-            let element = HTMLBodyElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLBodyElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)) => {
-            let element = HTMLButtonElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLButtonElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLCanvasElement)) => {
-            let element = HTMLCanvasElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLCanvasElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLFieldSetElement)) => {
-            let element = HTMLFieldSetElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLFieldSetElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLFontElement)) => {
-            let element = HTMLFontElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLFontElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLFormElement)) => {
-            let element = HTMLFormElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLFormElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLHeadElement)) => {
-            let element = HTMLHeadElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLHeadElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLImageElement)) => {
-            let element = HTMLImageElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLImageElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLIFrameElement)) => {
-            let element = HTMLIFrameElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLIFrameElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLInputElement)) => {
-            let element = HTMLInputElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLInputElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLinkElement)) => {
-            let element = HTMLLinkElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLLinkElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLObjectElement)) => {
-            let element = HTMLObjectElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLObjectElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLOptGroupElement)) => {
-            let element = HTMLOptGroupElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLOptGroupElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLOptionElement)) => {
-            let element = HTMLOptionElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLOptionElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLScriptElement)) => {
-            let element = HTMLScriptElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLScriptElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLSelectElement)) => {
-            let element = HTMLSelectElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLSelectElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLStyleElement)) => {
-            let element = HTMLStyleElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLStyleElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTableElement)) => {
             let element =
-                HTMLTableElementCast::to_borrowed_ref(node).unwrap();
+                HTMLTableElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTableCellElement(_))) => {
             let element =
-                HTMLTableCellElementCast::to_borrowed_ref(node).unwrap();
+                HTMLTableCellElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTableRowElement)) => {
             let element =
-                HTMLTableRowElementCast::to_borrowed_ref(node).unwrap();
+                HTMLTableRowElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTableSectionElement)) => {
             let element =
-                HTMLTableSectionElementCast::to_borrowed_ref(node).unwrap();
+                HTMLTableSectionElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTextAreaElement)) => {
-            let element = HTMLTextAreaElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLTextAreaElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLTitleElement)) => {
             let element =
-                HTMLTitleElementCast::to_borrowed_ref(node).unwrap();
+                HTMLTitleElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(ElementTypeId::Element) => {
-            let element = ElementCast::to_borrowed_ref(node).unwrap();
+            let element = ElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         NodeTypeId::Element(_) => {
-            let element = HTMLElementCast::to_borrowed_ref(node).unwrap();
+            let element = HTMLElementCast::to_ref(node).unwrap();
             element as &'a (VirtualMethods + 'a)
         }
         _ => {