Have Window inherit EventTarget interface

Source/core/page/Window.idl

 /*
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  * Copyright (C) 2011 Google Inc. All rights reserved.
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 [
     CheckSecurity,
-    EventTarget,
     CustomToV8,
     DoNotGenerateWrap,
     ImplementedAs=DOMWindow
-] interface Window {
+] interface Window : EventTarget {
     // DOM Level 0
     [Replaceable] readonly attribute Screen screen;
     [Replaceable] readonly attribute History history;
     [Replaceable] readonly attribute BarProp locationbar;
     [Replaceable] readonly attribute BarProp menubar;
     [Replaceable] readonly attribute BarProp personalbar;
     [Replaceable] readonly attribute BarProp scrollbars;
     [Replaceable] readonly attribute BarProp statusbar;
     [Replaceable] readonly attribute BarProp toolbar;
     [Replaceable, PerWorldBindings, ActivityLog=GetterForIsolatedWorlds] readonly attribute Navigator navigator;
@@ skipping 212 matching lines @@
     attribute EventListener ontransitionend;
     [Conditional=ORIENTATION_EVENTS] attribute EventListener onorientationchange;
     [EnabledAtRuntime=touch] attribute EventListener ontouchstart;
     [EnabledAtRuntime=touch] attribute EventListener ontouchmove;
     [EnabledAtRuntime=touch] attribute EventListener ontouchend;
     [EnabledAtRuntime=touch] attribute EventListener ontouchcancel;
 
     [EnabledAtRuntime=deviceMotion] attribute EventListener ondevicemotion;
     [EnabledAtRuntime=deviceOrientation] attribute EventListener ondeviceorientation;
 
-    // EventTarget interface
-    [Custom] void addEventListener(DOMString type,
-                                  EventListener listener,
-                                  optional boolean useCapture);
-    [Custom] void removeEventListener(DOMString type,
-                                      EventListener listener,
-                                      optional boolean useCapture);
-    [RaisesException] boolean dispatchEvent(Event evt);
-
     // Additional constructors.
     attribute TransitionEventConstructor WebKitTransitionEvent;
     [CustomConstructor] attribute HTMLImageElementConstructorConstructor Image; // Usable with new operator
     // Mozilla has a separate XMLDocument object for XML documents.
     // We just use Document for this.
     attribute DocumentConstructor XMLDocument;
     attribute URLConstructor webkitURL; // FIXME: deprecate this.
     attribute MutationObserverConstructor WebKitMutationObserver; // FIXME: Add metrics to determine when we can remove this.
     attribute IDBCursorConstructor webkitIDBCursor;
     attribute IDBDatabaseConstructor webkitIDBDatabase;
@@ skipping 20 matching lines @@
 
     // window.toString() requires special handling in V8
     [DoNotCheckSignature, DoNotCheckSecurity, Custom, NotEnumerable] DOMString toString();
 
     [ImplementedAs=anonymousIndexedGetter, NotEnumerable] getter Window(unsigned long index);
     [Custom, NotEnumerable] getter Window (DOMString name);
 };
 
 Window implements WindowTimers;