Implement SingleThreadProxy CommitVSyncParameters

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 445 matching lines @@
     DebugScopedSetMainThread main(this);
     // This must happen before we notify the scheduler as it may try to recreate
     // the output surface if already in BEGIN_IMPL_FRAME_STATE_IDLE.
     layer_tree_host_->DidLoseOutputSurface();
   }
   client_->DidAbortSwapBuffers();
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->DidLoseOutputSurface();
 }
 
+void SingleThreadProxy::CommitVSyncParameters(base::TimeTicks timebase,
+                                              base::TimeDelta interval) {
+  if (scheduler_on_impl_thread_)

[enne (OOO), 2014/12/15 19:25:15]

Actually, should this be a DCHECK? Does this get called by embedders not using
the scheduler? Or before the scheduler is created?

[brianderson, 2014/12/15 19:59:50]

I wouldn't expect this to get called before the scheduler is created.

However, I don't think there's logic in any of the many origins of this call
that considers what kind of cc::Proxy is used.

Either way, I don't think we need to make this a DCHECK. For configs where we
would hit the DCHECK, I don't see us caring about performance cost of a message
we don't listen to.

+    scheduler_on_impl_thread_->CommitVSyncParameters(timebase, interval);
+}
+
 void SingleThreadProxy::DidSwapBuffersOnImplThread() {
   TRACE_EVENT0("cc", "SingleThreadProxy::DidSwapBuffersOnImplThread");
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->DidSwapBuffers();
   client_->DidPostSwapBuffers();
 }
 
 void SingleThreadProxy::DidSwapBuffersCompleteOnImplThread() {
   TRACE_EVENT0("cc", "SingleThreadProxy::DidSwapBuffersCompleteOnImplThread");
   if (scheduler_on_impl_thread_)
@@ skipping 318 matching lines @@
 
 void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
 void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
   layer_tree_host_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc