Eagerly unregister PostMessageTimer as a context observer.

third_party/WebKit/Source/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LocalDOMWindow_h
 #define LocalDOMWindow_h
 
 #include "core/CoreExport.h"
-#include "core/dom/MessagePort.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindow.h"
 #include "core/frame/DOMWindowLifecycleNotifier.h"
 #include "core/frame/DOMWindowLifecycleObserver.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/LocalFrameLifecycleObserver.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 #include "wtf/Assertions.h"
@@ skipping 97 matching lines @@
     void resizeBy(int x, int y) const override;
     void resizeTo(int width, int height) const override;
     PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&) override;
     PassRefPtrWillBeRawPtr<CSSStyleDeclaration> getComputedStyle(Element*, const String& pseudoElt) const override;
     PassRefPtrWillBeRawPtr<CSSRuleList> getMatchedCSSRules(Element*, const String& pseudoElt) const override;
     int requestAnimationFrame(FrameRequestCallback*) override;
     int webkitRequestAnimationFrame(FrameRequestCallback*) override;
     void cancelAnimationFrame(int id) override;
     int requestIdleCallback(IdleRequestCallback*, const IdleRequestOptions&) override;
     void cancelIdleCallback(int id) override;
-    void schedulePostMessage(PassRefPtrWillBeRawPtr<MessageEvent>, LocalDOMWindow* source, SecurityOrigin* target, PassRefPtr<ScriptCallStack> stackTrace);
+    void schedulePostMessage(PassRefPtrWillBeRawPtr<MessageEvent>, SecurityOrigin* target, PassRefPtr<ScriptCallStack>);
 
     void registerProperty(DOMWindowProperty*);
     void unregisterProperty(DOMWindowProperty*);
 
     void reset();
 
     unsigned pendingUnloadEventListeners() const;
 
     bool allowPopUp(); // Call on first window, not target window.
     static bool allowPopUp(LocalFrame& firstFrame);
@@ skipping 124 matching lines @@
 }
 
 inline String LocalDOMWindow::defaultStatus() const
 {
     return m_defaultStatus;
 }
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h