Fix a crash in MediaSessionServiceImpl due to life time issue

content/browser/media/session/media_session_impl.h

Index: content/browser/media/session/media_session_impl.h
diff --git a/content/browser/media/session/media_session_impl.h b/content/browser/media/session/media_session_impl.h
index 6ed0ce44b981307427d2c27605c3c215946c8cab..b9837cdb98226bc6606a6cac06ee494726a223e5 100644
--- a/content/browser/media/session/media_session_impl.h
+++ b/content/browser/media/session/media_session_impl.h
@@ -167,6 +167,8 @@ class MediaSessionImpl : public MediaSession,
   // WebContentsObserver implementation
   void WebContentsDestroyed() override;
 
+  void RenderFrameDeleted(RenderFrameHost* rfh) override;

[Charlie Reis, 2017/02/23 20:36:41]

nit: The convention is to have no blank line before.  (Have all the overrides in
a block.)

[Zhiqiang Zhang (Slow), 2017/02/23 21:04:05]

Done.

+
   // MediaSessionService-related methods
 
   // Called when a MediaSessionService is created, which registers itself to