Keep vsync enabled while there is a pending requestAnimationFrame

cc/trees/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/thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/base/thread.h"
@@ skipping 250 matching lines @@
 }
 
 void ThreadProxy::SetNeedsAnimate() {
   DCHECK(IsMainThread());
   if (animate_requested_)
     return;
 
   TRACE_EVENT0("cc", "ThreadProxy::SetNeedsAnimate");
   animate_requested_ = true;
 
+  Proxy::ImplThread()->PostTask(base::Bind(
+      &ThreadProxy::SetAnimateRequestedOnImplThread, impl_thread_weak_ptr_));
+
   if (commit_request_sent_to_impl_thread_)
     return;
   commit_request_sent_to_impl_thread_ = true;
   Proxy::ImplThread()->PostTask(base::Bind(
       &ThreadProxy::SetNeedsCommitOnImplThread, impl_thread_weak_ptr_));
 }
 
 void ThreadProxy::SetNeedsCommit() {
   DCHECK(IsMainThread());
   if (commit_requested_)
@@ skipping 79 matching lines @@
                has_pending_tree);
   scheduler_on_impl_thread_->SetHasPendingTree(has_pending_tree);
 }
 
 void ThreadProxy::SetNeedsCommitOnImplThread() {
   DCHECK(IsImplThread());
   TRACE_EVENT0("cc", "ThreadProxy::SetNeedsCommitOnImplThread");
   scheduler_on_impl_thread_->SetNeedsCommit();
 }
 
+void ThreadProxy::SetAnimateRequestedOnImplThread() {
+  DCHECK(IsImplThread());
+  TRACE_EVENT0("cc", "ThreadProxy::SetAnimateRequestedOnImplThread");
+  scheduler_on_impl_thread_->SetAnimateRequested();
+}
+
 void ThreadProxy::SetNeedsManageTilesOnImplThread() {
   if (manage_tiles_pending_)
     return;
   Proxy::ImplThread()->PostTask(
       base::Bind(&ThreadProxy::ManageTilesOnImplThread, impl_thread_weak_ptr_));
   manage_tiles_pending_ = true;
 }
 
 void ThreadProxy::ManageTilesOnImplThread() {
   // TODO(nduca): If needed, move this into CCSchedulerStateMachine.
@@ skipping 960 matching lines @@
       base::Bind(&ThreadProxy::StartScrollbarAnimationOnImplThread,
                  impl_thread_weak_ptr_),
       delay);
 }
 
 void ThreadProxy::StartScrollbarAnimationOnImplThread() {
   layer_tree_host_impl_->StartScrollbarAnimation(base::TimeTicks::Now());
 }
 
 }  // namespace cc