[MediaSession, Android] Adding visibility tests for MediaSession

content/browser/media/session/media_session.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_
 #define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_
 
 #include <stddef.h>
 
 #include "base/id_map.h"
@@ skipping 35 matching lines @@
 
   enum class SuspendType {
     // Suspended by the system because a transient sound needs to be played.
     SYSTEM,
     // Suspended by the UI.
     UI,
     // Suspended by the page via script or user interaction.
     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);
 
   ~MediaSession() override;
 
   void setMetadata(const MediaMetadata& metadata) {
     metadata_ = metadata;
   }
   const MediaMetadata& metadata() const { return metadata_; }
@@ skipping 47 matching lines @@
   // Returns if the session is currently suspended.
   // TODO(mlamouri): IsSuspended() below checks if the state is not ACTIVE
   // instead of checking if the state is SUSPENDED. In order to not have to
   // change all the callers and make the current refactoring ridiculously huge,
   // this method is introduced temporarily and will be removed later.
   bool IsReallySuspended() const;
 
   // 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;
 
   CONTENT_EXPORT void SetDelegateForTests(
       scoped_ptr<MediaSessionDelegate> delegate);
   CONTENT_EXPORT bool IsActiveForTest() const;
   CONTENT_EXPORT Type audio_focus_type_for_test() const;
   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);
     PlayerIdentifier(const PlayerIdentifier&) = default;
 
     void operator=(const PlayerIdentifier&) = delete;
     bool operator==(const PlayerIdentifier& player_identifier) const;
 
     // Hash operator for base::hash_map<>.
     struct Hash {
@@ skipping 41 matching lines @@
   double volume_multiplier_;
 
   MediaMetadata metadata_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSession);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_