Cleanup: Move ContextProviderWebContext into cc/blink.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index e204c63ddc10b87f11b107db748492809b436980..cba9562c2b210d6efd0f0b67ed78c1fb99a84580 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -56,6 +56,10 @@ namespace cc {
 class ContextProvider;
 }
 
+namespace cc_blink {
+class ContextProviderWebContext;
+}
+
 namespace IPC {
 class MessageFilter;
 }
@@ -69,13 +73,6 @@ namespace v8 {
 class Extension;
 }
 
-namespace webkit {
-namespace gpu {
-class ContextProviderWebContext;
-class GrContextForWebGraphicsContext3D;
-}
-}
-
 namespace content {
 
 class AppCacheDispatcher;
@@ -324,8 +321,8 @@ class CONTENT_EXPORT RenderThreadImpl
 
   scoped_refptr<media::GpuVideoAcceleratorFactories> GetGpuFactories();
 
-  scoped_refptr<webkit::gpu::ContextProviderWebContext>
-      SharedMainThreadContextProvider();
+  scoped_refptr<cc_blink::ContextProviderWebContext>
+  SharedMainThreadContextProvider();
 
   // AudioRendererMixerManager instance which manages renderer side mixer
   // instances shared based on configured audio parameters.  Lazily created on
@@ -566,7 +563,7 @@ class CONTENT_EXPORT RenderThreadImpl
   scoped_ptr<InputHandlerManager> input_handler_manager_;
   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 
-  scoped_refptr<webkit::gpu::ContextProviderWebContext>
+  scoped_refptr<cc_blink::ContextProviderWebContext>
       shared_main_thread_contexts_;
 
   ObserverList<RenderProcessObserver> observers_;