[cc] Rename all cc/ filenames to Chromium style

cc/HeadsUpDisplayLayerChromium.h

 // Copyright 2012 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 HeadsUpDisplayLayerChromium_h
-#define HeadsUpDisplayLayerChromium_h
-
-#include "base/memory/scoped_ptr.h"
-#include "CCFontAtlas.h"
-#include "IntSize.h"
-#include "LayerChromium.h"
-
-namespace cc {
-
-class HeadsUpDisplayLayerChromium : public LayerChromium {
-public:
-    static scoped_refptr<HeadsUpDisplayLayerChromium> create();
-
-    virtual void update(CCTextureUpdateQueue&, const CCOcclusionTracker*, CCRenderingStats&) OVERRIDE;
-    virtual bool drawsContent() const OVERRIDE;
-
-    void setFontAtlas(scoped_ptr<CCFontAtlas>);
-
-    virtual scoped_ptr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
-    virtual void pushPropertiesTo(CCLayerImpl*) OVERRIDE;
-
-protected:
-    HeadsUpDisplayLayerChromium();
-
-private:
-    virtual ~HeadsUpDisplayLayerChromium();
-
-    scoped_ptr<CCFontAtlas> m_fontAtlas;
-};
-
-}  // namespace cc
-
-#endif
+// Temporary forwarding header
+#include "cc/heads_up_display_layer.h"