cc: Make scheduling be driven by vsync for android webview.

cc/trees/single_thread_proxy.cc

 // Copyright 2011 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.
 
 #include "cc/trees/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/debug/devtools_instrumentation.h"
@@ skipping 495 matching lines @@
     RequestNewOutputSurface();
     // RequestNewOutputSurface could have synchronously created an output
     // surface, so check again before returning.
     if (layer_tree_host_->output_surface_lost())
       return;
   }
 
   {
     BeginFrameArgs begin_frame_args(BeginFrameArgs::Create(
         BEGINFRAME_FROM_HERE, frame_begin_time, base::TimeTicks(),
-        BeginFrameArgs::DefaultInterval(), BeginFrameArgs::SYNCHRONOUS));
+        BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL));
     DoBeginMainFrame(begin_frame_args);
     DoCommit();
 
     DCHECK_EQ(0u, layer_tree_host_->num_queued_swap_promises())
         << "Commit should always succeed and transfer promises.";
   }
 
   {
     DebugScopedSetImplThread impl(const_cast<SingleThreadProxy*>(this));
     if (layer_tree_host_impl_->settings().impl_side_painting) {
@@ skipping 268 matching lines @@
   }
 }
 
 void SingleThreadProxy::ScheduledActionPrepareTiles() {
   TRACE_EVENT0("cc", "SingleThreadProxy::ScheduledActionPrepareTiles");
   DCHECK(layer_tree_host_impl_->settings().impl_side_painting);
   DebugScopedSetImplThread impl(this);
   layer_tree_host_impl_->PrepareTiles();
 }
 
+void SingleThreadProxy::ScheduledActionInvalidateOutputSurface() {
+  DCHECK(layer_tree_host_impl_->output_surface());
+  layer_tree_host_impl_->output_surface()->Invalidate();
+}
+
 void SingleThreadProxy::DidAnticipatedDrawTimeChange(base::TimeTicks time) {
 }
 
 base::TimeDelta SingleThreadProxy::DrawDurationEstimate() {
   return timing_history_.DrawDurationEstimate();
 }
 
 base::TimeDelta SingleThreadProxy::BeginMainFrameToCommitDurationEstimate() {
   return timing_history_.BeginMainFrameToCommitDurationEstimate();
 }
 
 base::TimeDelta SingleThreadProxy::CommitToActivateDurationEstimate() {
   return timing_history_.CommitToActivateDurationEstimate();
 }
 
 void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
 void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
   layer_tree_host_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc