Hook up ui::Compositor to Display's BeginFrameSource

content/browser/compositor/browser_compositor_output_surface.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 CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_
 
-#include <memory>
-
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "build/build_config.h"
 #include "cc/output/output_surface.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "content/common/content_export.h"
 #include "ui/compositor/compositor_vsync_manager.h"
 
 namespace cc {
 class SoftwareOutputDevice;
 }
 
 namespace gfx {
 enum class SwapResult;
 }
@@ skipping 39 matching lines @@
   virtual void SetSurfaceSuspendedForRecycle(bool suspended) = 0;
   virtual bool SurfaceShouldNotShowFramesAfterSuspendForRecycle() const = 0;
 #endif
 
  protected:
   // Constructor used by the accelerated implementation.
   BrowserCompositorOutputSurface(
       const scoped_refptr<cc::ContextProvider>& context,
       const scoped_refptr<cc::ContextProvider>& worker_context,
       const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
+      base::SingleThreadTaskRunner* task_runner,
       std::unique_ptr<BrowserCompositorOverlayCandidateValidator>
           overlay_candidate_validator);
 
   // Constructor used by the software implementation.
   BrowserCompositorOutputSurface(
       std::unique_ptr<cc::SoftwareOutputDevice> software_device,
-      const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager);
+      const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
+      base::SingleThreadTaskRunner* task_runner);
 
   scoped_refptr<ui::CompositorVSyncManager> vsync_manager_;
+  std::unique_ptr<cc::SyntheticBeginFrameSource> synthetic_begin_frame_source_;
   ReflectorImpl* reflector_;
 
   // True when BeginFrame scheduling is enabled.
   bool use_begin_frame_scheduling_;
 
  private:
   void Initialize();
 
+  void UpdateVSyncParametersInternal(base::TimeTicks timebase,
+                                     base::TimeDelta interval);
+
   std::unique_ptr<BrowserCompositorOverlayCandidateValidator>
       overlay_candidate_validator_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserCompositorOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_H_