Rename Animate as Begin(Main)Frame

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index 9eb6e0e3140ba777d81cacad13b45d8e811914f9..a539d13bab87da1cd515e544442197341bb41814 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -97,7 +97,7 @@ LayerTreeHost::LayerTreeHost(LayerTreeHostClient* client,
                              const LayerTreeSettings& settings)
     : micro_benchmark_controller_(this),
       next_ui_resource_id_(1),
-      animating_(false),
+      inside_begin_main_frame_(false),
       needs_full_tree_sync_(true),
       client_(client),
       source_frame_number_(0),
@@ -239,10 +239,10 @@ void LayerTreeHost::DidBeginMainFrame() {
   client_->DidBeginMainFrame();
 }
 
-void LayerTreeHost::UpdateClientAnimations(base::TimeTicks frame_begin_time) {
-  animating_ = true;
-  client_->Animate(frame_begin_time);
-  animating_ = false;
+void LayerTreeHost::BeginMainFrame(const BeginFrameArgs& args) {
+  inside_begin_main_frame_ = true;
+  client_->BeginMainFrame(args);
+  inside_begin_main_frame_ = false;
 }
 
 void LayerTreeHost::DidStopFlinging() {
@@ -1093,7 +1093,7 @@ void LayerTreeHost::ApplyScrollAndScale(ScrollAndScaleSet* info) {
 }
 
 void LayerTreeHost::StartRateLimiter() {
-  if (animating_)
+  if (inside_begin_main_frame_)
     return;
 
   if (!rate_limit_timer_.IsRunning()) {