Accelerate small canvases if Ganesh is on.

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 165 matching lines @@
     virtual void handleKeyboardEventOnTextField(WebCore::HTMLInputElement&, WebCore::KeyboardEvent&) OVERRIDE;
 
     // FIXME: Remove this method once we have input routing in the browser
     // process. See http://crbug.com/339659.
     virtual void forwardInputEvent(WebCore::Frame*, WebCore::Event*) OVERRIDE;
 
     virtual void didCancelCompositionOnSelectionChange() OVERRIDE;
     virtual void willSetInputMethodState() OVERRIDE;
     virtual void didUpdateTextOfFocusedElementByNonUserInput() OVERRIDE;
 
+    virtual bool usesGpuRasterization() OVERRIDE;
+
 private:
     virtual bool isChromeClientImpl() const OVERRIDE { return true; }
 
     WebNavigationPolicy getNavigationPolicy();
     void setCursor(const WebCursorInfo&);
 
     WebViewImpl* m_webView;  // weak pointer
     bool m_toolbarsVisible;
     bool m_statusbarVisible;
     bool m_scrollbarsVisible;
@@ skipping 16 matching lines @@
     explicit NavigatorContentUtilsClientImpl(WebViewImpl*);
 
     WebViewImpl* m_webView;
 };
 
 DEFINE_TYPE_CASTS(ChromeClientImpl, WebCore::ChromeClient, client, client->isChromeClientImpl(), client.isChromeClientImpl());
 
 } // namespace blink
 
 #endif