cc: Save correct frame begin time to FrameRateCounter

cc/single_thread_proxy.cc

Index: cc/single_thread_proxy.cc
diff --git a/cc/single_thread_proxy.cc b/cc/single_thread_proxy.cc
index 3a64d828032bf6f77715f7e2608e561a7cf158c5..9a95a1d90bd6410f4bc3160d5f83332f813cddde 100644
--- a/cc/single_thread_proxy.cc
+++ b/cc/single_thread_proxy.cc
@@ -55,7 +55,7 @@ bool SingleThreadProxy::CompositeAndReadback(void* pixels, gfx::Rect rect) {
   TRACE_EVENT0("cc", "SingleThreadProxy::compositeAndReadback");
   DCHECK(Proxy::IsMainThread());
 
-  if (!CommitAndComposite())
+  if (!CommitAndComposite(base::TimeTicks::Now()))
     return false;
 
   {
@@ -335,8 +335,8 @@ void SingleThreadProxy::didLoseOutputSurfaceOnImplThread() {
 
 // Called by the legacy scheduling path (e.g. where render_widget does the
 // scheduling)
-void SingleThreadProxy::CompositeImmediately() {
-  if (CommitAndComposite()) {
+void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) {
+  if (CommitAndComposite(frame_begin_time)) {
     layer_tree_host_impl_->swapBuffers();
     DidSwapFrame();
   }
@@ -366,7 +366,7 @@ void SingleThreadProxy::ForceSerializeOnSwapBuffers() {
 
 void SingleThreadProxy::onSwapBuffersCompleteOnImplThread() { NOTREACHED(); }
 
-bool SingleThreadProxy::CommitAndComposite() {
+bool SingleThreadProxy::CommitAndComposite(base::TimeTicks frame_begin_time) {
   DCHECK(Proxy::IsMainThread());
 
   if (!layer_tree_host_->initializeRendererIfNeeded())
@@ -392,13 +392,14 @@ bool SingleThreadProxy::CommitAndComposite() {
 
   layer_tree_host_->willCommit();
   DoCommit(queue.Pass());
-  bool result = DoComposite(offscreen_context_provider);
+  bool result = DoComposite(offscreen_context_provider, frame_begin_time);
   layer_tree_host_->didBeginFrame();
   return result;
 }
 
 bool SingleThreadProxy::DoComposite(
-    scoped_refptr<cc::ContextProvider> offscreen_context_provider) {
+    scoped_refptr<cc::ContextProvider> offscreen_context_provider,
+    base::TimeTicks frame_begin_time) {
   DCHECK(!output_surface_lost_);
   {
     DebugScopedSetImplThread impl(this);
@@ -421,7 +422,7 @@ bool SingleThreadProxy::DoComposite(
 
     LayerTreeHostImpl::FrameData frame;
     layer_tree_host_impl_->prepareToDraw(frame);
-    layer_tree_host_impl_->drawLayers(frame);
+    layer_tree_host_impl_->drawLayers(frame, frame_begin_time);
     layer_tree_host_impl_->didDrawAllLayers(frame);
     output_surface_lost_ = layer_tree_host_impl_->isContextLost();