Refactoring the way begin frame sources inside scheduler work.

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/debug/trace_event.h"
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/output/context_provider.h"
@@ skipping 413 matching lines @@
   client_->DidPostSwapBuffers();
 }
 
 void SingleThreadProxy::DidSwapBuffersCompleteOnImplThread() {
   TRACE_EVENT0("cc", "SingleThreadProxy::DidSwapBuffersCompleteOnImplThread");
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->DidSwapBuffersComplete();
   layer_tree_host_->DidCompleteSwapBuffers();
 }
 
-void SingleThreadProxy::BeginFrame(const BeginFrameArgs& args) {
-  TRACE_EVENT0("cc", "SingleThreadProxy::BeginFrame");
-  if (scheduler_on_impl_thread_)
-    scheduler_on_impl_thread_->BeginFrame(args);
-}
-
 void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) {
   TRACE_EVENT0("cc", "SingleThreadProxy::CompositeImmediately");
   DCHECK(Proxy::IsMainThread());
   DCHECK(!layer_tree_host_->output_surface_lost());
 
   BeginFrameArgs begin_frame_args = BeginFrameArgs::Create(
       frame_begin_time, base::TimeTicks(), BeginFrameArgs::DefaultInterval());
   DoCommit(begin_frame_args);
 
   LayerTreeHostImpl::FrameData frame;
@@ skipping 100 matching lines @@
     DebugScopedSetMainThread main(this);
     next_frame_is_newly_committed_frame_ = false;
     layer_tree_host_->DidCommitAndDrawFrame();
   }
 }
 
 bool SingleThreadProxy::MainFrameWillHappenForTesting() {
   return false;
 }
 
-void SingleThreadProxy::SetNeedsBeginFrame(bool enable) {
-  layer_tree_host_impl_->SetNeedsBeginFrame(enable);
+BeginFrameSource* SingleThreadProxy::ExternalBeginFrameSource() {
+  return layer_tree_host_impl_.get();
 }
 
 void SingleThreadProxy::WillBeginImplFrame(const BeginFrameArgs& args) {
   layer_tree_host_impl_->WillBeginImplFrame(args);
 }
 
 void SingleThreadProxy::ScheduledActionSendBeginMainFrame() {
   TRACE_EVENT0("cc", "SingleThreadProxy::ScheduledActionSendBeginMainFrame");
   // Although this proxy is single-threaded, it's problematic to synchronously
   // have BeginMainFrame happen after ScheduledActionSendBeginMainFrame.  This
@@ skipping 117 matching lines @@
 
 base::TimeDelta SingleThreadProxy::CommitToActivateDurationEstimate() {
   return timing_history_.CommitToActivateDurationEstimate();
 }
 
 void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
 }  // namespace cc