Revert of [scheduler] Teach scheduler about audio state

third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
index c6e8f3e794960f330947e9cc1baf4a7e63d67e12..d0fcf0b3ff248ca367d92b3d530502e0af9025af 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
@@ -12,7 +12,6 @@
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/output/begin_frame_args.h"
-#include "platform/scheduler/base/real_time_domain.h"
 #include "platform/scheduler/base/task_queue_impl.h"
 #include "platform/scheduler/base/task_queue_selector.h"
 #include "platform/scheduler/base/virtual_time_domain.h"
@@ -42,9 +41,6 @@ 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);
 
 void ReportForegroundRendererTaskLoad(base::TimeTicks time, double load) {
   int load_percentage = static_cast<int>(load * 100);
@@ -193,7 +189,6 @@ RendererSchedulerImpl::MainThreadOnly::MainThreadOnly(
       begin_frame_not_expected_soon(false),
       in_idle_period_for_testing(false),
       use_virtual_time(false),
-      is_audio_playing(false),
       rail_mode_observer(nullptr) {}
 
 RendererSchedulerImpl::MainThreadOnly::~MainThreadOnly() {}
@@ -497,23 +492,6 @@ void RendererSchedulerImpl::OnRendererForegrounded() {
   ResumeTimerQueueWhenForegroundedOrResumed();
 }
 
-void RendererSchedulerImpl::OnAudioStateChanged() {
-  bool is_audio_playing = false;
-  for (WebViewSchedulerImpl* web_view_scheduler :
-       MainThreadOnly().web_view_schedulers) {
-    is_audio_playing = is_audio_playing || web_view_scheduler->IsAudioPlaying();
-  }
-
-  if (is_audio_playing == MainThreadOnly().is_audio_playing)
-    return;
-
-  MainThreadOnly().last_audio_state_change =
-      helper_.scheduler_tqm_delegate()->NowTicks();
-  MainThreadOnly().is_audio_playing = is_audio_playing;
-
-  UpdatePolicy();
-}
-
 void RendererSchedulerImpl::SuspendRenderer() {
   helper_.CheckOnValidThread();
   DCHECK(MainThreadOnly().renderer_backgrounded);
@@ -858,27 +836,6 @@ void RendererSchedulerImpl::UpdatePolicyLocked(UpdateType update_type) {
     new_policy_duration = touchstart_expected_flag_valid_for_duration;
   }
 
-  // Do not throttle while audio is playing or for a short period after that
-  // to make sure that pages playing short audio clips powered by timers
-  // work.
-  if (MainThreadOnly().last_audio_state_change &&
-      !MainThreadOnly().is_audio_playing) {
-    base::TimeTicks audio_will_expire =
-        MainThreadOnly().last_audio_state_change.value() +
-        kThrottlingDelayAfterAudioIsPlayed;
-
-    base::TimeDelta audio_will_expire_after = audio_will_expire - now;
-
-    if (audio_will_expire_after > base::TimeDelta()) {
-      if (new_policy_duration.is_zero()) {
-        new_policy_duration = audio_will_expire_after;
-      } else {
-        new_policy_duration =
-            std::min(new_policy_duration, audio_will_expire_after);
-      }
-    }
-  }
-
   if (new_policy_duration > base::TimeDelta()) {
     MainThreadOnly().current_policy_expiration_time = now + new_policy_duration;
     delayed_update_policy_runner_.SetDeadline(FROM_HERE, new_policy_duration,
@@ -1034,10 +991,6 @@ void RendererSchedulerImpl::UpdatePolicyLocked(UpdateType update_type) {
     new_policy.timer_queue_policy.time_domain_type = TimeDomainType::VIRTUAL;
   }
 
-  new_policy.should_disable_throttling =
-      ShouldDisableThrottlingBecauseOfAudio(now) ||
-      MainThreadOnly().use_virtual_time;
-
   // Tracing is done before the early out check, because it's quite possible we
   // will otherwise miss this information in traces.
   CreateTraceEventObjectSnapshotLocked();
@@ -1093,15 +1046,6 @@ void RendererSchedulerImpl::UpdatePolicyLocked(UpdateType update_type) {
         new_policy.rail_mode);
   }
 
-  if (new_policy.should_disable_throttling !=
-      MainThreadOnly().current_policy.should_disable_throttling) {
-    if (new_policy.should_disable_throttling) {
-      task_queue_throttler()->DisableThrottling();
-    } else {
-      task_queue_throttler()->EnableThrottling();
-    }
-  }
-
   DCHECK(compositor_task_runner_->IsQueueEnabled());
   MainThreadOnly().current_policy = new_policy;
 }
@@ -1631,28 +1575,9 @@ void RendererSchedulerImpl::EnableVirtualTime() {
   for (const scoped_refptr<TaskQueue>& task_queue : unthrottled_task_runners_)
     task_queue->SetTimeDomain(time_domain);
 
-  ForceUpdatePolicy();
-}
-
-bool RendererSchedulerImpl::ShouldDisableThrottlingBecauseOfAudio(
-    base::TimeTicks now) {
-  if (!MainThreadOnly().last_audio_state_change)
-    return false;
-
-  if (MainThreadOnly().is_audio_playing)
-    return true;
-
-  return MainThreadOnly().last_audio_state_change.value() +
-             kThrottlingDelayAfterAudioIsPlayed >
-         now;
-}
+  task_queue_throttler_->EnableVirtualTime();
 
-TimeDomain* RendererSchedulerImpl::GetActiveTimeDomain() {
-  if (MainThreadOnly().use_virtual_time) {
-    return GetVirtualTimeDomain();
-  } else {
-    return real_time_domain();
-  }
+  ForceUpdatePolicy();
 }
 
 // static