Roll Chrome into Mojo.

cc/scheduler/scheduler_state_machine.h

Index: cc/scheduler/scheduler_state_machine.h
diff --git a/cc/scheduler/scheduler_state_machine.h b/cc/scheduler/scheduler_state_machine.h
index b579998b5e1abbd6d912eb074d141ce90b9d491d..9dc7817d473c9ad6ee1c719746ca0dd2293238cd 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -124,6 +124,10 @@ class CC_EXPORT SchedulerStateMachine {
   // to make progress.
   bool BeginFrameNeeded() const;
 
+  // Indicates whether the scheduler should call
+  // SetNeedsBeginFrames(BeginFrameNeeded()) on the frame source.
+  bool ShouldSetNeedsBeginFrames(bool frame_source_needs_begin_frames) const;
+
   // Indicates that we need to independently poll for new state and actions
   // because we can't expect a BeginImplFrame. This is mostly used to avoid
   // drawing repeat frames with the synchronous compositor without dropping
@@ -157,6 +161,7 @@ class CC_EXPORT SchedulerStateMachine {
 
   // Indicates whether the LayerTreeHostImpl is visible.
   void SetVisible(bool visible);
+  bool visible() const { return visible_; }
 
   // Indicates that a redraw is required, either due to the impl tree changing
   // or the screen being damaged and simply needing redisplay.