services/ui: Remove unwanted gpu dependency from services/ui/surfaces.

services/ui/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 SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 #define SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/output/context_provider.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gpu {
 
 class CommandBufferProxyImpl;
+class GpuChannelHost;
 struct GpuProcessHostedCALayerTreeParamsMac;
 class TransferBuffer;
 
 namespace gles2 {
 class GLES2CmdHelper;
 class GLES2Implementation;
 }
 
 }  // namespace gpu
 
 namespace ui {
 class LatencyInfo;
 }
 
 namespace ui {
 
 class CommandBufferDriver;
 class CommandBufferImpl;
 class SurfacesContextProviderDelegate;
 
 class SurfacesContextProvider : public cc::ContextProvider,
                                 public base::NonThreadSafe {
  public:
-  explicit SurfacesContextProvider(gfx::AcceleratedWidget widget);
+  SurfacesContextProvider(gfx::AcceleratedWidget widget,
+                          scoped_refptr<gpu::GpuChannelHost> gpu_channel);
 
   void SetDelegate(SurfacesContextProviderDelegate* delegate);
 
   // cc::ContextProvider implementation.
   bool BindToCurrentThread() override;
   gpu::gles2::GLES2Interface* ContextGL() override;
   gpu::ContextSupport* ContextSupport() override;
   class GrContext* GrContext() override;
   void InvalidateGrContext(uint32_t state) override;
   gpu::Capabilities ContextCapabilities() override;
@@ skipping 32 matching lines @@
   gfx::AcceleratedWidget widget_;
   std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_proxy_impl_;
   gl::GLSurface::SwapCompletionCallback swap_buffers_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesContextProvider);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_SURFACES_SURFACES_CONTEXT_PROVIDER_H_