Remove GraphicsContext3D:: stubs from cc

cc/image_layer.cc

Index: cc/image_layer.cc
diff --git a/cc/image_layer.cc b/cc/image_layer.cc
index 04694a635f54d9bae342f2efd5eca1bf93ac6dc2..3b9d20928c6e3bcfb7fdc7b9998bb622a6b634c7 100644
--- a/cc/image_layer.cc
+++ b/cc/image_layer.cc
@@ -46,7 +46,7 @@ public:
         return scoped_ptr<LayerTextureUpdater::Texture>(new Texture(this, CCPrioritizedTexture::create(manager)));
     }
 
-    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE
+    virtual SampledTexelFormat sampledTexelFormat(GLenum textureFormat) OVERRIDE
     {
         return PlatformColor::sameComponentOrder(textureFormat) ?
                 LayerTextureUpdater::SampledTexelFormatRGBA : LayerTextureUpdater::SampledTexelFormatBGRA;
@@ -138,7 +138,7 @@ void ImageLayerChromium::createTextureUpdaterIfNeeded()
         return;
 
     m_textureUpdater = ImageLayerTextureUpdater::create();
-    GC3Denum textureFormat = layerTreeHost()->rendererCapabilities().bestTextureFormat;
+    GLenum textureFormat = layerTreeHost()->rendererCapabilities().bestTextureFormat;
     setTextureFormat(textureFormat);
     setSampledTexelFormat(textureUpdater()->sampledTexelFormat(textureFormat));
 }