NOT FOR COMMIT: Move background pausing to the WebView level

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

Index: third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
index a9c0be3a05e389c0296a5391829dc90a1a9b6fb2..3c35b9b0121a965269f199c126a9e08a18283763 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
@@ -99,8 +99,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
   void DidAnimateForInputOnCompositorThread() override;
   void OnRendererBackgrounded() override;
   void OnRendererForegrounded() override;
-  void SuspendRenderer() override;
-  void ResumeRenderer() override;
   void AddPendingNavigation(NavigatingFrameType type) override;
   void RemovePendingNavigation(NavigatingFrameType type) override;
   void OnNavigationStarted() override;
@@ -113,7 +111,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
   void Shutdown() override;
   void SuspendTimerQueue() override;
   void ResumeTimerQueue() override;
-  void SetTimerQueueSuspensionWhenBackgroundedEnabled(bool enabled) override;
   void SetTopLevelBlameContext(
       base::trace_event::BlameContext* blame_context) override;
   void SetRAILModeObserver(RAILModeObserver* observer) override;
@@ -323,11 +320,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
   // defined by RAILS.
   static const int kRailsResponseTimeMillis = 50;
 
-  // The amount of time to wait before suspending shared timers after the
-  // renderer has been backgrounded. This is used only if background suspension
-  // of shared timers is enabled.
-  static const int kSuspendTimersWhenBackgroundedDelayMillis = 5 * 60 * 1000;
-
   // The time we should stay in a priority-escalated mode after a call to
   // DidAnimateForInputOnCompositorThread().
   static const int kFlingEscalationLimitMillis = 100;
@@ -371,11 +363,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
   void UpdateForInputEventOnCompositorThread(WebInputEvent::Type type,
                                              InputEventState input_event_state);
 
-  // Helpers for safely suspending/resuming the timer queue after a
-  // background/foreground signal.
-  void SuspendTimerQueueWhenBackgrounded();
-  void ResumeTimerQueueWhenForegroundedOrResumed();
-
   // The task cost estimators and the UserModel need to be reset upon page
   // nagigation. This function does that. Must be called from the main thread.
   void ResetForNavigationLocked();
@@ -426,7 +413,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
   base::Closure update_policy_closure_;
   DeadlineTaskRunner delayed_update_policy_runner_;
   CancelableClosureHolder end_renderer_hidden_idle_period_closure_;
-  CancelableClosureHolder suspend_timers_when_backgrounded_closure_;
 
   using SeqLockQueueingTimeEstimator =
       device::SharedMemorySeqLockBuffer<QueueingTimeEstimator>;
@@ -461,9 +447,6 @@ class PLATFORM_EXPORT RendererSchedulerImpl
     ExpensiveTaskPolicy expensive_task_policy;
     bool renderer_hidden;
     bool renderer_backgrounded;
-    bool renderer_suspended;
-    bool timer_queue_suspension_when_backgrounded_enabled;
-    bool timer_queue_suspended_when_backgrounded;
     bool was_shutdown;
     bool loading_tasks_seem_expensive;
     bool timer_tasks_seem_expensive;