Remove redundant [WillBeGarbageCollected] uses on derived EventTargets.

[WillBeGarbageCollected] is already inherited from the parent EventTarget.

R=haraken
BUG=

Review URL: https://codereview.chromium.org/653263006

git-svn-id: svn://svn.chromium.org/blink/trunk@183800 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/animation/AnimationPlayer.idl

@@ -32,7 +32,6 @@ enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
 
 [
     NoInterfaceObject,
-    WillBeGarbageCollected,
     ActiveDOMObject,
 ] interface AnimationPlayer : EventTarget {
     [RuntimeEnabled=WebAnimationsAPI]                      attribute AnimationNode? source;

third_party/WebKit/Source/core/css/MediaQueryList.idl

@@ -21,7 +21,6 @@
 [
     ActiveDOMObject,
     NoInterfaceObject,
-    WillBeGarbageCollected
 ] interface MediaQueryList : EventTarget {
     readonly attribute DOMString media;
     readonly attribute boolean matches;

third_party/WebKit/Source/core/dom/MessagePort.idl

@@ -27,7 +27,6 @@
 
 [
     ActiveDOMObject,
-    WillBeGarbageCollected
 ] interface MessagePort : EventTarget {
     [Custom, RaisesException] void postMessage(any message, optional sequence<Transferable> transfer);
 

third_party/WebKit/Source/core/frame/Window.idl

@@ -32,7 +32,6 @@
     Custom=ToV8,
     ImplementedAs=LocalDOMWindow,
     PrimaryGlobal,
-    WillBeGarbageCollected,
 ] interface Window : EventTarget {
     // DOM Level 0
     readonly attribute Screen screen;

third_party/WebKit/Source/core/html/track/TextTrack.idl

@@ -28,7 +28,6 @@ enum TextTrackKind { "subtitles",  "captions",  "descriptions",  "chapters",  "m
 
 [
     SetWrapperReferenceFrom=owner,
-    WillBeGarbageCollected,
 ] interface TextTrack : EventTarget {
     readonly attribute TextTrackKind kind;
     readonly attribute DOMString label;

third_party/WebKit/Source/core/html/track/TextTrackCue.idl

@@ -28,7 +28,6 @@
 [
     SetWrapperReferenceFrom=owner,
     TypeChecking=Unrestricted,
-    WillBeGarbageCollected,
 ] interface TextTrackCue : EventTarget {
     readonly attribute TextTrack? track;
 

third_party/WebKit/Source/core/loader/appcache/ApplicationCache.idl

@@ -25,7 +25,6 @@
 
 [
     DoNotCheckConstants,
-    WillBeGarbageCollected,
 ] interface ApplicationCache : EventTarget {
     // update status
     const unsigned short UNCACHED = 0;
@@ -50,4 +49,3 @@
     attribute EventHandler oncached;
     attribute EventHandler onobsolete;
 };
-

third_party/WebKit/Source/core/page/EventSource.idl

@@ -30,7 +30,6 @@
  */
 
 [
-    WillBeGarbageCollected,
     ActiveDOMObject,
     Constructor(DOMString url, optional EventSourceInit eventSourceInit),
     ConstructorCallWith=ExecutionContext,

third_party/WebKit/Source/core/timing/Performance.idl

@@ -30,9 +30,7 @@
  */
 
 // See: http://www.w3.org/TR/navigation-timing/
-[
-    WillBeGarbageCollected
-] interface Performance : EventTarget {
+interface Performance : EventTarget {
     readonly attribute PerformanceNavigation navigation;
     readonly attribute PerformanceTiming timing;
     readonly attribute MemoryInfo memory;
@@ -56,4 +54,3 @@
     // See http://www.w3.org/TR/hr-time/ for details.
     double now();
 };
-

third_party/WebKit/Source/core/workers/SharedWorker.idl

@@ -37,7 +37,6 @@
     ConstructorCallWith=ExecutionContext,
     RaisesException=Constructor,
     RuntimeEnabled=SharedWorker,
-    WillBeGarbageCollected,
 ] interface SharedWorker : EventTarget {
     readonly attribute MessagePort port;
 };

third_party/WebKit/Source/core/workers/Worker.idl

@@ -32,7 +32,6 @@
     Constructor(DOMString scriptUrl),
     ConstructorCallWith=ExecutionContext,
     RaisesException=Constructor,
-    WillBeGarbageCollected,
 ] interface Worker : EventTarget {
 
     attribute EventHandler onmessage;

third_party/WebKit/Source/core/workers/WorkerGlobalScope.idl

@@ -27,7 +27,6 @@
 [
     Custom=ToV8,
     Exposed=Worker,
-    WillBeGarbageCollected
 ] interface WorkerGlobalScope : EventTarget {
 
     // WorkerGlobalScope

third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.idl

@@ -41,7 +41,6 @@ enum ServiceWorkerState {
 [
     ActiveDOMObject,
     RuntimeEnabled=ServiceWorker,
-    WillBeGarbageCollected
 ] interface ServiceWorker : EventTarget {
 
     // FIXME: Should inherit this from Worker.