cc: Control defer_commits logic by Scheduler

cc/scheduler/scheduler_state_machine_unittest.cc

Index: cc/scheduler/scheduler_state_machine_unittest.cc
diff --git a/cc/scheduler/scheduler_state_machine_unittest.cc b/cc/scheduler/scheduler_state_machine_unittest.cc
index af6d83a0d5e3028b87d4c1f664d9acc2ada5bf10..9214774a4a398951768d82c34560fe705d6ab1e1 100644
--- a/cc/scheduler/scheduler_state_machine_unittest.cc
+++ b/cc/scheduler/scheduler_state_machine_unittest.cc
@@ -1838,5 +1838,26 @@ TEST(SchedulerStateMachineTest, TestForwardBeginFramesToChildren) {
   EXPECT_TRUE(state.BeginFrameNeeded());
 }
 
+TEST(SchedulerStateMachineTest, TestDeferCommit) {
+  SchedulerSettings settings;
+  StateMachine state(settings);
+  state.SetCanStart();
+  state.UpdateState(state.NextAction());
+  state.CreateAndInitializeOutputSurfaceWithActivatedCommit();
+  state.SetVisible(true);
+  state.SetCanDraw(true);
+
+  state.SetDeferCommits(true);
+
+  state.SetNeedsCommit();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  state.OnBeginImplFrame(CreateBeginFrameArgsForTesting());

[brianderson, 2014/12/03 02:12:10]

EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);?

[simonhong, 2015/01/19 14:53:33]

Done.

+
+  state.OnBeginImplFrameDeadlinePending();

[brianderson, 2014/12/03 02:12:10]

EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);?

[simonhong, 2015/01/19 14:53:33]

This is removed.

+  state.OnBeginImplFrameDeadline();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+}
+
 }  // namespace
 }  // namespace cc