Fix DelegatedOutputSurface in Blimp

blimp/client/core/compositor/delegated_output_surface.h

 // Copyright 2016 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 BLIMP_CLIENT_CORE_COMPOSITOR_DELEGATED_OUTPUT_SURFACE_H_
 #define BLIMP_CLIENT_CORE_COMPOSITOR_DELEGATED_OUTPUT_SURFACE_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "blimp/client/core/compositor/blimp_output_surface.h"
 #include "cc/output/output_surface.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace cc {
+class BeginFrameSource;
 class ContextProvider;
 }  // namespace cc
 
 namespace blimp {
 namespace client {
 
 // This class is created on the main thread, but then becomes bound to the
 // compositor thread and will be destroyed there (soon, crbug.com/640730).
 class DelegatedOutputSurface : public cc::OutputSurface,
                                public BlimpOutputSurface {
@@ skipping 15 matching lines @@
   // BlimpOutputSurface implementation.
   void ReclaimCompositorResources(
       const cc::ReturnedResourceArray& resources) override;
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   base::WeakPtr<BlimpOutputSurfaceClient> client_;
 
   bool bound_to_client_;
 
+  // This OutputSurface is responsible for providing the BeginFrameSource to
+  // drive frame creation.  This will be built on the compositor impl thread at
+  // BindToClient call time.
+  std::unique_ptr<cc::BeginFrameSource> begin_frame_source_;
+
   base::WeakPtrFactory<DelegatedOutputSurface> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegatedOutputSurface);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_COMPOSITOR_DELEGATED_OUTPUT_SURFACE_H_