Update from chromium https://crrev.com/301725/

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 fc82fb6ecedf431b67a84b1351ea3c6152f51cb8..e3530c877f4cb68bbf793217225dcc1fe3b4bf24 100644
--- a/cc/scheduler/scheduler_state_machine_unittest.cc
+++ b/cc/scheduler/scheduler_state_machine_unittest.cc
@@ -1761,6 +1761,39 @@ TEST(SchedulerStateMachineTest, TestAnimateBeforeCommit) {
       SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
 }
 
+TEST(SchedulerStateMachineTest, TestAnimateAfterCommitBeforeDraw) {
+  SchedulerSettings settings;
+  settings.impl_side_painting = true;
+  StateMachine state(settings);
+  state.SetCanStart();
+  state.UpdateState(state.NextAction());
+  state.CreateAndInitializeOutputSurfaceWithActivatedCommit();
+  state.SetVisible(true);
+  state.SetCanDraw(true);
+
+  // Check that animations are updated before we start a commit.
+  state.SetNeedsAnimate();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+  state.SetNeedsCommit();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+  EXPECT_TRUE(state.BeginFrameNeeded());
+
+  state.OnBeginImplFrame(CreateBeginFrameArgsForTesting());
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_ANIMATE);
+  EXPECT_ACTION_UPDATE_STATE(
+      SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME);
+
+  state.NotifyBeginMainFrameStarted();
+  state.NotifyReadyToCommit();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_COMMIT);
+
+  state.OnBeginImplFrameDeadlinePending();
+  state.OnBeginImplFrameDeadline();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_ANIMATE);
+  EXPECT_ACTION_UPDATE_STATE(
+      SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
+}
+
 TEST(SchedulerStateMachineTest, TestSetNeedsAnimateAfterAnimate) {
   SchedulerSettings settings;
   settings.impl_side_painting = true;