Expand suspension of idle media players to all platforms.

media/blink/webmediaplayer_impl.h

Index: media/blink/webmediaplayer_impl.h
diff --git a/media/blink/webmediaplayer_impl.h b/media/blink/webmediaplayer_impl.h
index 9cba070a829618539b7004c36893bf19ffd18f8d..41774db41537a8afc08da5eef289fbc491ed8469 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -168,8 +168,9 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   void exitedFullscreen() override;
 
   // WebMediaPlayerDelegate::Observer implementation.
-  void OnHidden(bool must_suspend) override;
+  void OnHidden() override;
   void OnShown() override;
+  void OnSuspendRequested(bool must_suspend) override;
   void OnPlay() override;
   void OnPause() override;
   void OnVolumeMultiplierUpdate(double multiplier) override;
@@ -285,6 +286,9 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   void ReportMemoryUsage();
   void FinishMemoryUsageReport(int64_t demuxer_memory_usage);
 
+  // Indicates if automatic resumption of a suspended playback is allowed.
+  bool IsAutomaticResumeAllowed();
+
   blink::WebLocalFrame* frame_;
 
   // TODO(hclam): get rid of these members and read from the pipeline directly.