CompositingReasonFinder should use a virtual function instead of a nest of branches

Source/web/ChromeClientImpl.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 130 matching lines @@
     virtual void enumerateChosenDirectory(WebCore::FileChooser*) OVERRIDE;
     virtual void setCursor(const WebCore::Cursor&) OVERRIDE;
     virtual void needTouchEvents(bool needTouchEvents) OVERRIDE;
     virtual void setTouchAction(WebCore::TouchAction) OVERRIDE;
 
     virtual WebCore::GraphicsLayerFactory* graphicsLayerFactory() const OVERRIDE;
 
     // Pass 0 as the GraphicsLayer to detatch the root layer.
     virtual void attachRootGraphicsLayer(WebCore::GraphicsLayer*) OVERRIDE;
 
-    virtual CompositingTriggerFlags allowedCompositingTriggers() const OVERRIDE;
+    virtual WebCore::CompositingTriggerFlags allowedCompositingTriggers() const OVERRIDE;
 
     virtual void enterFullScreenForElement(WebCore::Element*) OVERRIDE;
     virtual void exitFullScreenForElement(WebCore::Element*) OVERRIDE;
 
     // ChromeClient methods:
     virtual void postAccessibilityNotification(WebCore::AXObject*, WebCore::AXObjectCache::AXNotification) OVERRIDE;
     virtual String acceptLanguages() OVERRIDE;
 
     // ChromeClientImpl:
     void setCursorForPlugin(const WebCursorInfo&);
@@ skipping 61 matching lines @@
     explicit NavigatorContentUtilsClientImpl(WebViewImpl*);
 
     WebViewImpl* m_webView;
 };
 
 DEFINE_TYPE_CASTS(ChromeClientImpl, WebCore::ChromeClient, client, client->isChromeClientImpl(), client.isChromeClientImpl());
 
 } // namespace blink
 
 #endif