Revert of cc: Implement shared worker contexts.

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 4ac40da397886d380f7409016b263cbb3aa5d15c..b09df57f599261b7925350fbf68477383fafe09b 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -325,9 +325,6 @@
   // A TaskRunner instance that runs tasks on the raster worker pool.
   base::TaskRunner* GetWorkerTaskRunner();
 
-  // Returns a shared worker context provider that can be used on any thread.
-  scoped_refptr<ContextProviderCommandBuffer> SharedWorkerContextProvider();
-
   // Causes the idle handler to skip sending idle notifications
   // on the two next scheduled calls, so idle notifications are
   // not sent for at least one notification delay.
@@ -592,7 +589,6 @@
 
   base::ObserverList<RenderProcessObserver> observers_;
 
-  scoped_refptr<ContextProviderCommandBuffer> shared_worker_context_provider_;
   scoped_refptr<ContextProviderCommandBuffer> gpu_va_context_provider_;
 
   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;