cc: Split animating and drawing into separate actions

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 18ecb50cf63ebab345fc53e64c50335aecae66e5..9518b37383629f5c5f5114236821169258e178ff 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -31,6 +31,7 @@ class SchedulerClient {
   virtual DrawSwapReadbackResult ScheduledActionDrawAndSwapIfPossible() = 0;
   virtual DrawSwapReadbackResult ScheduledActionDrawAndSwapForced() = 0;
   virtual DrawSwapReadbackResult ScheduledActionDrawAndReadback() = 0;
+  virtual void ScheduledActionAnimate() = 0;
   virtual void ScheduledActionCommit() = 0;
   virtual void ScheduledActionUpdateVisibleTiles() = 0;
   virtual void ScheduledActionActivatePendingTree() = 0;
@@ -73,6 +74,8 @@ class CC_EXPORT Scheduler {
 
   void SetNeedsRedraw();
 
+  void SetNeedsAnimate();
+
   void SetNeedsManageTiles();
 
   void SetSwapUsedIncompleteTile(bool used_incomplete_tile);