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 1f377b5a1ca182404c3ca15aa90f604b024b96aa..56ecc8f38a3cc5a8076e6f272ec4e209326c10e6 100644
--- a/cc/scheduler/scheduler_state_machine_unittest.cc
+++ b/cc/scheduler/scheduler_state_machine_unittest.cc
@@ -1929,5 +1929,32 @@ 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_TRUE(state.BeginFrameNeeded());
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  state.OnBeginImplFrame(CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE));
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  state.OnBeginImplFrameDeadline();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  state.SetDeferCommits(false);
+  state.OnBeginImplFrame(CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE));
+  EXPECT_ACTION_UPDATE_STATE(
+      SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME);
+}
+
 }  // namespace
 }  // namespace cc