Cleanup RemotePlatformLayer when disconnecting RemoteFrame.

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. 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.
@@ skipping 963 matching lines @@
 
 static LocalFrame* subframeForTargetNode(Node* node)
 {
     if (!node)
         return nullptr;
 
     RenderObject* renderer = node->renderer();
     if (!renderer || !renderer->isRenderPart())
         return nullptr;
 
-    // FIXME: This explicit check is needed only until RemoteFrames have RemoteFrameViews.
-    if (isHTMLFrameElementBase(node) && toHTMLFrameElementBase(node)->contentFrame() && toHTMLFrameElementBase(node)->contentFrame()->isRemoteFrameTemporary())
-        return nullptr;
-
     Widget* widget = toRenderPart(renderer)->widget();
     if (!widget || !widget->isFrameView())
         return nullptr;
 
     return &toFrameView(widget)->frame();
 }
 
 static LocalFrame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
 {
     if (!hitTestResult.isOverWidget())
@@ skipping 2908 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink