Remove swap ack throttling to regain performance regression on freon

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 0d94edbb9cc49e7f78289bb62fa6e4f586d7ea95..1b762c660cdedeb5d11a3e5c551104203cbf2dc5 100644
--- a/cc/scheduler/scheduler_state_machine_unittest.cc
+++ b/cc/scheduler/scheduler_state_machine_unittest.cc
@@ -1730,16 +1730,6 @@ TEST(SchedulerStateMachineTest, TestImplLatencyTakesPriority) {
   // Finish the previous commit and draw it.
   FinishPreviousCommitAndDrawWithoutExitingDeadline(&state);
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
-
-  // Verify we do not send another BeginMainFrame if was are swap throttled
-  // and did not just swap.
-  state.SetNeedsCommit();
-  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
-  state.OnBeginImplFrame();
-  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
-  EXPECT_FALSE(state.ShouldTriggerBeginImplFrameDeadlineImmediately());
-  state.OnBeginImplFrameDeadline();
-  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 }
 
 TEST(SchedulerStateMachineTest,