Pass main thread responsiveness threshold via Finch

third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.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 "platform/scheduler/renderer/renderer_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 29 matching lines @@
 // Amount of idle time left in a frame (as a ratio of the vsync interval) above
 // which main thread compositing can be considered fast.
 const double kFastCompositingIdleTimeThreshold = .2;
 constexpr base::TimeDelta kThreadLoadTrackerReportingInterval =
     base::TimeDelta::FromMinutes(1);
 constexpr base::TimeDelta kThreadLoadTrackerWaitingPeriodBeforeReporting =
     base::TimeDelta::FromMinutes(2);
 // We do not throttle anything while audio is played and shortly after that.
 constexpr base::TimeDelta kThrottlingDelayAfterAudioIsPlayed =
     base::TimeDelta::FromSeconds(5);
-// Maximum task queueing time before the main thread is considered unresponsive.
-constexpr base::TimeDelta kMainThreadResponsivenessThreshold =
-    base::TimeDelta::FromMilliseconds(200);
 
 void ReportForegroundRendererTaskLoad(base::TimeTicks time, double load) {
   int load_percentage = static_cast<int>(load * 100);
   UMA_HISTOGRAM_PERCENTAGE("RendererScheduler.ForegroundRendererMainThreadLoad",
                            load_percentage);
   TRACE_COUNTER1(TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
                  "RendererScheduler.ForegroundRendererLoad", load_percentage);
 }
 
 void ReportBackgroundRendererTaskLoad(base::TimeTicks time, double load) {
@@ skipping 41 matching lines @@
           base::Bind(&RendererSchedulerImpl::UpdatePolicy,
                      base::Unretained(this)),
           helper_.ControlTaskRunner()),
       seqlock_queueing_time_estimator_(
           QueueingTimeEstimator(this, base::TimeDelta::FromSeconds(1))),
       main_thread_only_(this,
                         compositor_task_runner_,
                         helper_.scheduler_tqm_delegate().get(),
                         helper_.scheduler_tqm_delegate()->NowTicks()),
       policy_may_need_update_(&any_thread_lock_),
-      main_thread_responsiveness_threshold_(kMainThreadResponsivenessThreshold),
       weak_factory_(this) {
   task_queue_throttler_.reset(
       new TaskQueueThrottler(this, "renderer.scheduler"));
   update_policy_closure_ = base::Bind(&RendererSchedulerImpl::UpdatePolicy,
                                       weak_factory_.GetWeakPtr());
   end_renderer_hidden_idle_period_closure_.Reset(base::Bind(
       &RendererSchedulerImpl::EndIdlePeriod, weak_factory_.GetWeakPtr()));
 
   suspend_timers_when_backgrounded_closure_.Reset(
       base::Bind(&RendererSchedulerImpl::SuspendTimerQueueWhenBackgrounded,
@@ skipping 1474 matching lines @@
   default_loading_task_runner_->SetBlameContext(blame_context);
   default_timer_task_runner_->SetBlameContext(blame_context);
   compositor_task_runner_->SetBlameContext(blame_context);
   idle_helper_.IdleTaskRunner()->SetBlameContext(blame_context);
 }
 
 void RendererSchedulerImpl::SetRAILModeObserver(RAILModeObserver* observer) {
   MainThreadOnly().rail_mode_observer = observer;
 }
 
-bool RendererSchedulerImpl::MainThreadSeemsUnresponsive() {
+bool RendererSchedulerImpl::MainThreadSeemsUnresponsive(
+    base::TimeDelta main_thread_responsiveness_threshold) {
   base::TimeTicks now = tick_clock()->NowTicks();
   base::TimeDelta estimated_queueing_time;
 
   bool can_read = false;
   QueueingTimeEstimator::State queueing_time_estimator_state;
 
   base::subtle::Atomic32 version;
   seqlock_queueing_time_estimator_.seqlock.TryRead(&can_read, &version);
 
   // If we fail to determine if the main thread is busy, assume whether or not
   // it's busy hasn't change since the last time we asked.
   if (!can_read)
     return CompositorThreadOnly().main_thread_seems_unresponsive;
 
   queueing_time_estimator_state = seqlock_queueing_time_estimator_.data.state();
 
   // If we fail to determine if the main thread is busy, assume whether or not
   // it's busy hasn't change since the last time we asked.
   if (seqlock_queueing_time_estimator_.seqlock.ReadRetry(version))
     return CompositorThreadOnly().main_thread_seems_unresponsive;
 
   QueueingTimeEstimator queueing_time_estimator(queueing_time_estimator_state);
 
   estimated_queueing_time =
       queueing_time_estimator.EstimateQueueingTimeIncludingCurrentTask(now);
 
   bool main_thread_seems_unresponsive =
-      estimated_queueing_time > main_thread_responsiveness_threshold_;
+      estimated_queueing_time > main_thread_responsiveness_threshold;
   CompositorThreadOnly().main_thread_seems_unresponsive =
       main_thread_seems_unresponsive;
 
   return main_thread_seems_unresponsive;
 }
 
 void RendererSchedulerImpl::RegisterTimeDomain(TimeDomain* time_domain) {
   helper_.RegisterTimeDomain(time_domain);
 }
 
@@ skipping 221 matching lines @@
     case TimeDomainType::VIRTUAL:
       return "virtual";
     default:
       NOTREACHED();
       return nullptr;
   }
 }
 
 }  // namespace scheduler
 }  // namespace blink