[scheduler] Teach scheduler about audio state

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

Index: third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h b/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
index a4b7c679dc8ae299d214eb4aa7f35b86fd22484c..8e2f6a67dd1a2d2400319539cf282f7163b8593c 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
@@ -45,6 +45,7 @@ class BLINK_PLATFORM_EXPORT WebViewSchedulerImpl : public WebViewScheduler {
   void enableVirtualTime() override;
   bool virtualTimeAllowedToAdvance() const override;
   void setVirtualTimePolicy(VirtualTimePolicy virtual_time_policy) override;
+  void audioStateChanged(bool is_audio_playing) override;
 
   // Virtual for testing.
   virtual void ReportIntervention(const std::string& message);
@@ -58,6 +59,8 @@ class BLINK_PLATFORM_EXPORT WebViewSchedulerImpl : public WebViewScheduler {
   void DecrementBackgroundParserCount();
   void Unregister(WebFrameSchedulerImpl* frame_scheduler);
 
+  bool IsAudioPlaying() const;
+
  private:
   void setAllowVirtualTimeToAdvance(bool allow_virtual_time_to_advance);
   void ApplyVirtualTimePolicy();
@@ -73,6 +76,7 @@ class BLINK_PLATFORM_EXPORT WebViewSchedulerImpl : public WebViewScheduler {
   bool allow_virtual_time_to_advance_;
   bool have_seen_loading_task_;
   bool virtual_time_;
+  bool is_audio_playing_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewSchedulerImpl);
 };