Hook up ui::Compositor to Display's BeginFrameSource

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 19 matching lines @@
 class CommandBufferDriver;
 class CommandBufferImpl;
 class CommandBufferLocal;
 class GpuState;
 class SurfacesContextProviderDelegate;
 
 class SurfacesContextProvider : public cc::ContextProvider,
                                 public CommandBufferLocalClient,
                                 public base::NonThreadSafe {
  public:
-  SurfacesContextProvider(SurfacesContextProviderDelegate* delegate,
-                          gfx::AcceleratedWidget widget,
+  SurfacesContextProvider(gfx::AcceleratedWidget widget,
                           const scoped_refptr<GpuState>& state);
 
+  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;
   Capabilities ContextCapabilities() override;
   void DeleteCachedResources() override {}
   void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) override;
@@ skipping 23 matching lines @@
   CommandBufferLocal* command_buffer_local_;
 
   base::Lock context_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesContextProvider);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_SURFACES_SURFACES_CONTEXT_PROVIDER_H_