cc: Add SchedulerStateMachine::DidDraw and use for forced draws

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 21d153cf2b5433be82890067f35ce3d1ce3a82da..0aedb036d97697c73d2de54ba2647f36a1430abc 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -123,6 +123,7 @@ class CC_EXPORT SchedulerStateMachine {
 
   Action NextAction() const;
   void WillAction(Action action);
+  void DidAction(Action action);

[sunnyps, 2015/08/25 17:23:24]

nit: DidPerformAction?

 
   // Indicates whether the impl thread needs a BeginImplFrame callback in order
   // to make progress.
@@ -191,8 +192,8 @@ class CC_EXPORT SchedulerStateMachine {
     return impl_latency_takes_priority_;
   }
 
-  // Indicates whether ACTION_DRAW_AND_SWAP_IF_POSSIBLE drew to the screen.
-  void DidDrawIfPossibleCompleted(DrawResult result);
+  // Indicates whether a draw request succeeded or not.
+  void SetDrawResult(DrawResult result);
 
   // Indicates that a new begin main frame flow needs to be performed, either
   // to pull updates from the main thread to the impl, or to push deltas from
@@ -288,11 +289,13 @@ class CC_EXPORT SchedulerStateMachine {
   void WillSendBeginMainFrame();
   void WillCommit(bool commit_had_no_updates);
   void WillActivate();
-  void WillDraw(bool did_request_swap);
+  void WillDraw();
   void WillBeginOutputSurfaceCreation();
   void WillPrepareTiles();
   void WillInvalidateOutputSurface();
 
+  void DidDraw(bool did_request_swap);
+
   const SchedulerSettings settings_;
 
   OutputSurfaceState output_surface_state_;
@@ -326,6 +329,7 @@ class CC_EXPORT SchedulerStateMachine {
   int pending_swaps_;
   int swaps_with_current_output_surface_;
   bool needs_redraw_;
+  DrawResult last_draw_result_;
   bool needs_animate_;
   bool needs_prepare_tiles_;
   bool needs_begin_main_frame_;