Change cc files from namespace WebCore to cc

cc/CCLayerTilingData.h

Index: cc/CCLayerTilingData.h
diff --git a/cc/CCLayerTilingData.h b/cc/CCLayerTilingData.h
index 391639a55f17904a643701fc72f5c8f9deea5e5e..694205084e7a6cf0db2f9c1a1a3405a814bbbfb8 100644
--- a/cc/CCLayerTilingData.h
+++ b/cc/CCLayerTilingData.h
@@ -15,7 +15,7 @@
 #include <wtf/HashTraits.h>
 #include <wtf/PassOwnPtr.h>
 
-namespace WebCore {
+namespace cc {
 
 class CCLayerTilingData {
 public:
@@ -31,7 +31,7 @@ public:
 
     // Change the tile size. This may invalidate all the existing tiles.
     void setTileSize(const IntSize&);
-    const IntSize& tileSize() const;
+    IntSize tileSize() const;
     // Change the border texel setting. This may invalidate all existing tiles.
     void setBorderTexelOption(BorderTexelOption);
     bool hasBorderTexels() const { return m_tilingData.borderTexels(); }