Fix remaining cc files to compile with Clang

cc/ContentLayerChromium.h

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #ifndef ContentLayerChromium_h
 #define ContentLayerChromium_h
 
 #if USE(ACCELERATED_COMPOSITING)
 
@@ skipping 36 matching lines @@
     virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
     virtual bool needMoreUpdates() OVERRIDE;
 
     virtual void setOpaque(bool) OVERRIDE;
 
 protected:
     explicit ContentLayerChromium(ContentLayerChromiumClient*);
 
 
 private:
-    virtual LayerTextureUpdater* textureUpdater() const OVERRIDE { return m_textureUpdater.get(); }
+    virtual LayerTextureUpdater* textureUpdater() const OVERRIDE;
     virtual void createTextureUpdaterIfNeeded() OVERRIDE;
 
     ContentLayerChromiumClient* m_client;
     RefPtr<LayerTextureUpdater> m_textureUpdater;
 };
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)
 
 #endif