cc: Be less aggressive about scheduling for scroll handlers

cc/scheduler/scheduler_state_machine_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/scheduler_state_machine.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/scheduler/scheduler.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 1729 matching lines @@
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_ANIMATE);
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 
   EXPECT_TRUE(state.ShouldTriggerBeginImplFrameDeadlineEarly());
   state.OnBeginImplFrameDeadline();
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
   state.DidSwapBuffers();
 }
 
-TEST(SchedulerStateMachineTest, TestSmoothnessTakesPriority) {
+TEST(SchedulerStateMachineTest, TestImplLatencyTakesPriority) {
   SchedulerSettings settings;
   settings.impl_side_painting = true;
   StateMachine state(settings);
   state.SetCanStart();
   state.UpdateState(state.NextAction());
   state.CreateAndInitializeOutputSurfaceWithActivatedCommit();
   state.SetVisible(true);
   state.SetCanDraw(true);
 
   // This test ensures that impl-draws are prioritized over main thread updates
-  // in prefer smoothness mode.
+  // in prefer impl latency mode.
   state.SetNeedsRedraw(true);
   state.SetNeedsCommit();
   state.OnBeginImplFrame(CreateBeginFrameArgsForTesting());
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_ANIMATE);
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME);
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 
   // Verify the deadline is not triggered early until we enter
-  // prefer smoothness mode.
+  // prefer impl latency mode.
   EXPECT_FALSE(state.ShouldTriggerBeginImplFrameDeadlineEarly());
-  state.SetSmoothnessTakesPriority(true);
+  state.SetImplLatencyTakesPriority(true);
   EXPECT_TRUE(state.ShouldTriggerBeginImplFrameDeadlineEarly());
 
   // Trigger the deadline.
   state.OnBeginImplFrameDeadline();
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
   state.DidSwapBuffers();
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
   state.DidSwapBuffersComplete();
 
@@ skipping 118 matching lines @@
   state.SetNeedsAnimate();
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 
   state.OnBeginImplFrameDeadline();
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
 }
 
 }  // namespace
 }  // namespace cc