Rename Animate as Begin(Main)Frame

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index f4007330011329151558931a8b3955779ab44ab3..ab7757966d15c0bc8824a1a3b5d5847ecec56b02 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -430,7 +430,7 @@ bool SingleThreadProxy::DoComposite(base::TimeTicks frame_begin_time,
     }
 
     layer_tree_host_impl_->Animate(
-        layer_tree_host_impl_->CurrentFrameTimeTicks());
+        layer_tree_host_impl_->CurrentBeginFrameArgs().frame_time);
     UpdateBackgroundAnimateTicking();
 
     if (!layer_tree_host_impl_->IsContextLost()) {
@@ -443,7 +443,7 @@ bool SingleThreadProxy::DoComposite(base::TimeTicks frame_begin_time,
     bool start_ready_animations = true;
     layer_tree_host_impl_->UpdateAnimationState(start_ready_animations);
 
-    layer_tree_host_impl_->ResetCurrentFrameTimeForNextFrame();
+    layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
   }
 
   if (lost_output_surface) {