cc: Don't attempt main thread synchronization if it is slow.

cc/test/scheduler_test_common.h

Index: cc/test/scheduler_test_common.h
diff --git a/cc/test/scheduler_test_common.h b/cc/test/scheduler_test_common.h
index 41c214597e12a2348b156fd8df0c8412eceb1c94..17f2f1088623f50a55e6d8efdf0177264e68bb9e 100644
--- a/cc/test/scheduler_test_common.h
+++ b/cc/test/scheduler_test_common.h
@@ -169,12 +169,20 @@ class FakeCompositorTimingHistory : public CompositorTimingHistory {
   void SetAllEstimatesTo(base::TimeDelta duration);
 
   void SetBeginMainFrameToCommitDurationEstimate(base::TimeDelta duration);
+  void SetBeginMainFrameQueueDurationCriticalEstimate(base::TimeDelta duration);
+  void SetBeginMainFrameQueueDurationNotCriticalEstimate(
+      base::TimeDelta duration);
+  void SetBeginMainFrameStartToCommitDurationEstimate(base::TimeDelta duration);
   void SetCommitToReadyToActivateDurationEstimate(base::TimeDelta duration);
   void SetPrepareTilesDurationEstimate(base::TimeDelta duration);
   void SetActivateDurationEstimate(base::TimeDelta duration);
   void SetDrawDurationEstimate(base::TimeDelta duration);
 
   base::TimeDelta BeginMainFrameToCommitDurationEstimate() const override;
+  base::TimeDelta BeginMainFrameQueueDurationCriticalEstimate() const override;
+  base::TimeDelta BeginMainFrameQueueDurationNotCriticalEstimate()
+      const override;
+  base::TimeDelta BeginMainFrameStartToCommitDurationEstimate() const override;
   base::TimeDelta CommitToReadyToActivateDurationEstimate() const override;
   base::TimeDelta PrepareTilesDurationEstimate() const override;
   base::TimeDelta ActivateDurationEstimate() const override;
@@ -188,6 +196,9 @@ class FakeCompositorTimingHistory : public CompositorTimingHistory {
       rendering_stats_instrumentation_owned_;
 
   base::TimeDelta begin_main_frame_to_commit_duration_;
+  base::TimeDelta begin_main_frame_queue_duration_critical_;
+  base::TimeDelta begin_main_frame_queue_duration_not_critical_;
+  base::TimeDelta begin_main_frame_start_to_commit_duration_;
   base::TimeDelta commit_to_ready_to_activate_duration_;
   base::TimeDelta prepare_tiles_duration_;
   base::TimeDelta activate_duration_;
@@ -232,6 +243,14 @@ class TestScheduler : public Scheduler {
     return begin_impl_frame_tracker_.Interval();
   }
 
+  // Note: This setting will be overriden on the next BeginFrame in the
+  // scheduler. To control the value it gets on the next BeginFrame
+  // Pass in a fake CompositorTimingHistory that indicates BeginMainFrame
+  // to Activation is fast.
+  void SetCriticalBeginMainFrameToActivateIsFast(bool is_fast) {
+    state_machine_.SetCriticalBeginMainFrameToActivateIsFast(is_fast);
+  }
+
  protected:
   // Overridden from Scheduler.
   base::TimeTicks Now() const override;