cc: Heuristic for Renderer latency recovery

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 238c08c42d166c47acd80c4a682fd225cbf6d033..41112ff04a19bd2bea0ca65c4371777747707759 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -145,6 +145,10 @@ class CC_EXPORT SchedulerStateMachine {
   // impl thread to draw, it is in a high latency mode.
   bool MainThreadIsInHighLatencyMode() const;
 
+  bool ImplThreadIsLikelyInHighLatencyMode() const {

[sunnyps, 2015/05/22 21:15:05]

Rename this to IsSwapThrottled or similar. We are only likely in high latency
mode if this is true at the start of the frame.

[brianderson, 2015/06/30 22:03:52]

Done.

+    return pending_swaps_ >= max_pending_swaps_;
+  }
+
   // Indicates whether the LayerTreeHostImpl is visible.
   void SetVisible(bool visible);
   bool visible() const { return visible_; }
@@ -193,6 +197,7 @@ class CC_EXPORT SchedulerStateMachine {
   // updates from the main thread to the impl, or to push deltas from the impl
   // thread to main.
   void SetNeedsCommit();
+  bool needs_commit() const { return needs_commit_; }
 
   // Call this only in response to receiving an ACTION_SEND_BEGIN_MAIN_FRAME
   // from NextAction.
@@ -208,6 +213,7 @@ class CC_EXPORT SchedulerStateMachine {
   // Allow access of the can_start_ state in tests.
   bool CanStartForTesting() const { return can_start_; }
 
+  // Indicates production should be skipped to recover latency.
   void SetSkipNextBeginMainFrameToReduceLatency();
 
   // Indicates whether drawing would, at this time, make sense.
@@ -333,7 +339,6 @@ class CC_EXPORT SchedulerStateMachine {
   bool did_create_and_initialize_first_output_surface_;
   bool impl_latency_takes_priority_;
   bool skip_next_begin_main_frame_to_reduce_latency_;
-  bool skip_begin_main_frame_to_reduce_latency_;
   bool continuous_painting_;
   bool children_need_begin_frames_;
   bool defer_commits_;