cc: Introduce BeginFrame sequence numbers and acknowledgements.

content/browser/android/synchronous_compositor_browser_filter.h

Index: content/browser/android/synchronous_compositor_browser_filter.h
diff --git a/content/browser/android/synchronous_compositor_browser_filter.h b/content/browser/android/synchronous_compositor_browser_filter.h
index bd40f5e053190587fdfdf6078233cc49bc486f57..8170c8fe6af8448f68f30078468290a78c99c6bd 100644
--- a/content/browser/android/synchronous_compositor_browser_filter.h
+++ b/content/browser/android/synchronous_compositor_browser_filter.h
@@ -11,7 +11,9 @@
 
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
+#include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame_metadata.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "ui/android/window_android_observer.h"
@@ -25,20 +27,15 @@ namespace content {
 class RenderProcessHost;
 class SynchronousCompositorHost;
 
-class SynchronousCompositorBrowserFilter : public ui::WindowAndroidObserver,
+class SynchronousCompositorBrowserFilter : public cc::BeginFrameObserver,
                                            public BrowserMessageFilter {
  public:
   explicit SynchronousCompositorBrowserFilter(int process_id);
 
-  // WindowAndroidObserver overrides.
-  void OnCompositingDidCommit() override;
-  void OnRootWindowVisibilityChanged(bool visible) override;
-  void OnAttachCompositor() override;
-  void OnDetachCompositor() override;
-  void OnVSync(base::TimeTicks frame_time,
-               base::TimeDelta vsync_period) override;
-  void OnActivityStopped() override;
-  void OnActivityStarted() override;
+  // cc::BeginFrameObserver overrides.
+  void OnBeginFrame(const cc::BeginFrameArgs& args) override;
+  const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override;
+  void OnBeginFrameSourcePausedChanged(bool paused) override;
 
   // BrowserMessageFilter overrides.
   bool OnMessageReceived(const IPC::Message& message) override;