Revert of Make lost context and error message callbacks on GpuControl go to client

components/mus/surfaces/surfaces_context_provider.h

 // Copyright 2014 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 COMPONENTS_MUS_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 #define COMPONENTS_MUS_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 49 matching lines @@
   void SetSwapBuffersCompletionCallback(
       gfx::GLSurface::SwapCompletionCallback callback);
 
  protected:
   friend class base::RefCountedThreadSafe<SurfacesContextProvider>;
   ~SurfacesContextProvider() override;
 
  private:
   // CommandBufferLocalClient:
   void UpdateVSyncParameters(int64_t timebase, int64_t interval) override;
+  void DidLoseContext() override;
   void GpuCompletedSwapBuffers(gfx::SwapResult result) override;
 
   // From GLES2Context:
   // Initialized in BindToCurrentThread.
   scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
   scoped_ptr<gpu::TransferBuffer> transfer_buffer_;
   scoped_ptr<gpu::gles2::GLES2Implementation> implementation_;
 
   cc::ContextProvider::Capabilities capabilities_;
   LostContextCallback lost_context_callback_;
 
   SurfacesContextProviderDelegate* delegate_;
   gfx::AcceleratedWidget widget_;
   CommandBufferLocal* command_buffer_local_;
 
   gfx::GLSurface::SwapCompletionCallback swap_buffers_completion_callback_;
 
   base::Lock context_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesContextProvider);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_SURFACES_SURFACES_CONTEXT_PROVIDER_H_