scheduler: Enable expensive task blocking by default

components/scheduler/renderer/renderer_scheduler.cc

 // Copyright 2014 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 "components/scheduler/renderer/renderer_scheduler.h"
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/time/default_tick_clock.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "components/scheduler/child/scheduler_tqm_delegate_impl.h"
 #include "components/scheduler/common/scheduler_switches.h"
 #include "components/scheduler/renderer/renderer_scheduler_impl.h"
 
 namespace scheduler {
 namespace {
 const base::Feature kExpensiveTaskBlockingPolicyFeature{
-    "SchedulerExpensiveTaskBlocking", base::FEATURE_DISABLED_BY_DEFAULT};
+    "SchedulerExpensiveTaskBlocking", base::FEATURE_ENABLED_BY_DEFAULT};
 }
 
 RendererScheduler::RendererScheduler() {
 }
 
 RendererScheduler::~RendererScheduler() {
 }
 
 // static
 std::unique_ptr<RendererScheduler> RendererScheduler::Create() {
@@ skipping 56 matching lines @@
       return "event_consumed_by_compositor";
     case InputEventState::EVENT_FORWARDED_TO_MAIN_THREAD:
       return "event_forwarded_to_main_thread";
     default:
       NOTREACHED();
       return nullptr;
   }
 }
 
 }  // namespace scheduler