Rename Animate as Begin(Main)Frame

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 6be853098a86117753738674d695a3893de05477..3026b6db2acff6aed955870aa51c332853f35ae7 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -18,6 +18,7 @@
 #include "cc/base/switches.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/layer.h"
+#include "cc/output/begin_frame_args.h"
 #include "cc/output/context_provider.h"
 #include "cc/trees/layer_tree_host.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -273,10 +274,10 @@ bool Compositor::HasAnimationObserver(CompositorAnimationObserver* observer) {
   return animation_observer_list_.HasObserver(observer);
 }
 
-void Compositor::Animate(base::TimeTicks frame_begin_time) {
+void Compositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
   FOR_EACH_OBSERVER(CompositorAnimationObserver,
                     animation_observer_list_,
-                    OnAnimationStep(frame_begin_time));
+                    OnAnimationStep(args.frame_time));
   if (animation_observer_list_.might_have_observers())
     host_->SetNeedsAnimate();
 }