Revert of cc: Implement shared worker contexts.

content/renderer/render_thread_impl.h

 // Copyright (c) 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 CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 307 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> GetFileThreadMessageLoopProxy();
 
   // Returns a SingleThreadTaskRunner instance corresponding to the message loop
   // of the thread on which media operations should be run. Must be called
   // on the renderer's main thread.
   scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
 
   // 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.
   void PostponeIdleNotification();
 
   scoped_refptr<media::GpuVideoAcceleratorFactories> GetGpuFactories();
 
   scoped_refptr<cc_blink::ContextProviderWebContext>
   SharedMainThreadContextProvider();
 
@@ skipping 244 matching lines @@
   scoped_ptr<InputHandlerManager> input_handler_manager_;
   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 
   scoped_refptr<BluetoothMessageFilter> bluetooth_message_filter_;
 
   scoped_refptr<cc_blink::ContextProviderWebContext>
       shared_main_thread_contexts_;
 
   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_;
   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 
   HistogramCustomizer histogram_customizer_;
 
   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 
 #if defined(ENABLE_WEBRTC)
@@ skipping 55 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_