[MediaSession, Android] Adding visibility tests for MediaSession

content/browser/media/session/media_session.h

Index: content/browser/media/session/media_session.h
diff --git a/content/browser/media/session/media_session.h b/content/browser/media/session/media_session.h
index 2553c6d7885d58e9b1159201568cdb02d7f9256d..c1759686a75c4c0438891d342246da8fc7105b17 100644
--- a/content/browser/media/session/media_session.h
+++ b/content/browser/media/session/media_session.h
@@ -53,6 +53,12 @@ class MediaSession : public WebContentsObserver,
     CONTENT,
   };
 
+  enum class State {
+    ACTIVE,
+    SUSPENDED,
+    INACTIVE
+  };
+
   // Returns the MediaSession associated to this WebContents. Creates one if
   // none is currently available.
   CONTENT_EXPORT static MediaSession* Get(WebContents* web_contents);
@@ -120,6 +126,8 @@ class MediaSession : public WebContentsObserver,
   // Returns if the session is currently suspended or inactive.
   CONTENT_EXPORT bool IsSuspended() const;
 
+  CONTENT_EXPORT State audio_focus_state_for_test() const;

[mlamouri (slow - plz ping), 2016/03/23 15:10:15]

Could you make MediaSessionIntegrationBrowserTestBase a friend? So it can
directly access the private member?

[Zhiqiang Zhang (Slow), 2016/03/24 18:16:49]

Done.

+
  private:
   friend class content::WebContentsUserData<MediaSession>;
   friend class ::MediaSessionBrowserTest;
@@ -131,12 +139,6 @@ class MediaSession : public WebContentsObserver,
   CONTENT_EXPORT void RemoveAllPlayersForTest();
   CONTENT_EXPORT MediaSessionUmaHelper* uma_helper_for_test();
 
-  enum class State {
-    ACTIVE,
-    SUSPENDED,
-    INACTIVE
-  };
-
   // Representation of a player for the MediaSession.
   struct PlayerIdentifier {
     PlayerIdentifier(MediaSessionObserver* observer, int player_id);