Rename Animate as Begin(Main)Frame

mojo/examples/compositor_app/compositor_host.cc

Index: mojo/examples/compositor_app/compositor_host.cc
diff --git a/mojo/examples/compositor_app/compositor_host.cc b/mojo/examples/compositor_app/compositor_host.cc
index 1c47cdb59caa7b6e124d1d6a10170011733c6f35..7664b3e488d47d352c6ead6a66f496690fd31aa3 100644
--- a/mojo/examples/compositor_app/compositor_host.cc
+++ b/mojo/examples/compositor_app/compositor_host.cc
@@ -58,10 +58,10 @@ void CompositorHost::SetupScene() {
 void CompositorHost::WillBeginMainFrame(int frame_id) {}
 void CompositorHost::DidBeginMainFrame() {}
 
-void CompositorHost::Animate(base::TimeTicks frame_begin_time) {
+void CompositorHost::BeginMainFrame(const cc::BeginFrameArgs& args) {
   // TODO(jamesr): Should use cc's animation system.
   static const double kDegreesPerSecond = 70.0;
-  double time_in_seconds = (frame_begin_time - base::TimeTicks()).InSecondsF();
+  double time_in_seconds = (args.frame_time - base::TimeTicks()).InSecondsF();
   double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
   gfx::Transform child_transform;
   child_transform.Translate(200, 200);