Update from https://crrev.com/307330

cc/scheduler/scheduler_settings.cc

 // Copyright 2013 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_settings.h"
 
 #include "base/debug/trace_event_argument.h"
 #include "cc/trees/layer_tree_settings.h"
 
 namespace cc {
@@ skipping 21 matching lines @@
       impl_side_painting(settings.impl_side_painting),
       timeout_and_draw_when_animation_checkerboards(
           settings.timeout_and_draw_when_animation_checkerboards),
       maximum_number_of_failed_draws_before_draw_is_forced_(
           settings.maximum_number_of_failed_draws_before_draw_is_forced_),
       using_synchronous_renderer_compositor(
           settings.using_synchronous_renderer_compositor),
       throttle_frame_production(settings.throttle_frame_production),
       disable_hi_res_timer_tasks_on_battery(
           settings.disable_hi_res_timer_tasks_on_battery),
-      main_thread_should_always_be_low_latency(
-          settings.main_thread_should_always_be_low_latency),
+      main_thread_should_always_be_low_latency(false),
       background_frame_interval(base::TimeDelta::FromSecondsD(
           1.0 / settings.background_animation_rate)) {
 }
 
 SchedulerSettings::~SchedulerSettings() {}
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
 SchedulerSettings::AsValue() const {
   scoped_refptr<base::debug::TracedValue> state =
       new base::debug::TracedValue();
@@ skipping 14 matching lines @@
   state->SetBoolean("disable_hi_res_timer_tasks_on_battery",
                     disable_hi_res_timer_tasks_on_battery);
   state->SetBoolean("main_thread_should_always_be_low_latency",
                     main_thread_should_always_be_low_latency);
   state->SetInteger("background_frame_interval",
                     background_frame_interval.InMicroseconds());
   return state;
 }
 
 }  // namespace cc