Auto merge of #11214 - farodin91:windowproxy, r=jdm

Support WindowProxy return values in bindings

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 --faster` does not report any errors
- [x] These changes fix #10965 (github issue number if applicable).

Either:
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process.

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components/script/dom/webidls/BrowserElement.webidl

@@ -159,16 +159,16 @@ interface BrowserElementPrivileged {
   //                    unsigned long count,
   //                    unsigned long modifiers);
 
-  [Func="Window::global_is_mozbrowser", Throws]
+  [Func="::dom::window::Window::global_is_mozbrowser", Throws]
   void goBack();
 
-  [Func="Window::global_is_mozbrowser", Throws]
+  [Func="::dom::window::Window::global_is_mozbrowser", Throws]
   void goForward();
 
-  [Func="Window::global_is_mozbrowser", Throws]
+  [Func="::dom::window::Window::global_is_mozbrowser", Throws]
   void reload(optional boolean hardReload = false);
 
-  [Func="Window::global_is_mozbrowser", Throws]
+  [Func="::dom::window::Window::global_is_mozbrowser", Throws]
   void stop();
 
   //[Throws,

components/script/dom/webidls/HTMLIFrameElement.webidl

@@ -13,8 +13,7 @@ interface HTMLIFrameElement : HTMLElement {
            attribute DOMString width;
            attribute DOMString height;
   readonly attribute Document? contentDocument;
-  //readonly attribute WindowProxy? contentWindow;
-  readonly attribute Window? contentWindow;
+  readonly attribute WindowProxy? contentWindow;
 
   // also has obsolete members
 };
@@ -31,7 +30,7 @@ partial interface HTMLIFrameElement {
 };
 
 partial interface HTMLIFrameElement {
-    [Func="Window::global_is_mozbrowser"]
+    [Func="::dom::window::Window::global_is_mozbrowser"]
     attribute boolean mozbrowser;
 };
 

components/script/dom/webidls/Window.webidl

@@ -6,10 +6,8 @@
 [PrimaryGlobal]
 /*sealed*/ interface Window : EventTarget {
   // the current browsing context
-  //[Unforgeable] readonly attribute WindowProxy window;
-  //[Replaceable] readonly attribute WindowProxy self;
-  readonly attribute Window window;
-  [BinaryName="Self_"] readonly attribute Window self;
+  [Unforgeable] readonly attribute WindowProxy window;
+  [BinaryName="Self_", Replaceable] readonly attribute WindowProxy self;
   [Unforgeable] readonly attribute Document document;
   //         attribute DOMString name;
   [/*PutForwards=href, */Unforgeable] readonly attribute Location location;
@@ -28,14 +26,11 @@
   //void blur();
 
   // other browsing contexts
-  //[Replaceable] readonly attribute WindowProxy frames;
-  readonly attribute Window frames;
+  [Replaceable] readonly attribute WindowProxy frames;
   //[Replaceable] readonly attribute unsigned long length;
-  //[Unforgeable] readonly attribute WindowProxy top;
-  readonly attribute Window top;
+  [Unforgeable] readonly attribute WindowProxy top;
   //         attribute any opener;
-  //readonly attribute WindowProxy parent;
-  readonly attribute Window parent;
+  readonly attribute WindowProxy parent;
   readonly attribute Element? frameElement;
   //WindowProxy open(optional DOMString url = "about:blank", optional DOMString target = "_blank",
   //                 optional DOMString features = "", optional boolean replace = false);
@@ -65,6 +60,9 @@
 Window implements GlobalEventHandlers;
 Window implements WindowEventHandlers;
 
+[NoInterfaceObject]
+interface WindowProxy {};
+
 // https://html.spec.whatwg.org/multipage/#timers
 [NoInterfaceObject/*, Exposed=Window,Worker*/]
 interface WindowTimers {