Android MediaSession: do not resume a UI suspended session on a system resume.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index d753e94cff46b66beadd710a7e8463a8e67b9d68..15ac5bd5326510da7bd0d732899b3ed8e454697f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -3316,11 +3316,11 @@ void WebContentsImpl::OnMediaSessionStateChanged() {
 }
 
 void WebContentsImpl::ResumeMediaSession() {
-  MediaSession::Get(this)->Resume();
+  MediaSession::Get(this)->Resume(MediaSession::SuspendType::UI);

[whywhat, 2015/07/21 19:21:28]

Perhaps you could pass the SuspendType::UI from Resume() and Suspend() and
SuspendType::System from OnResume/OnSuspend to avoid changing the MediaSession's
public API.

 }
 
 void WebContentsImpl::SuspendMediaSession() {
-  MediaSession::Get(this)->Suspend();
+  MediaSession::Get(this)->Suspend(MediaSession::SuspendType::UI);
 }
 
 #endif  // defined(OS_ANDROID)