cc: Removing base::TimeTicks argument to DrawLayers as it isn't used.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 53c2f0d2ce79636d4fdee10c7576195b904caa7e..155bb36e651f05e94bc0fdfffea52ff04fdcc5e1 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1405,8 +1405,7 @@ static void LayerTreeHostImplDidBeginTracingCallback(LayerImpl* layer) {
   layer->DidBeginTracing();
 }
 
-void LayerTreeHostImpl::DrawLayers(FrameData* frame,
-                                   base::TimeTicks frame_begin_time) {
+void LayerTreeHostImpl::DrawLayers(FrameData* frame) {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::DrawLayers");
   DCHECK(CanDraw());
 
@@ -1419,7 +1418,7 @@ void LayerTreeHostImpl::DrawLayers(FrameData* frame,
 
   DCHECK(!frame->render_passes.empty());
 
-  fps_counter_->SaveTimeStamp(frame_begin_time,
+  fps_counter_->SaveTimeStamp(current_frame_timeticks_,
                               !output_surface_->context_provider());
   bool on_main_thread = false;
   rendering_stats_instrumentation_->IncrementFrameCount(