Decouple MediaSession/MediaSessionObserver from WebContents in Java[OBSOLETE, go to the combined CL]

content/browser/media/session/media_session_impl.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_IMPL_H_
 #define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_IMPL_H_
 
 #include <stddef.h>
 
 #include "base/callback_list.h"
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/optional.h"
 #include "content/browser/media/session/audio_focus_manager.h"
 #include "content/browser/media/session/media_session_uma_helper.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/media_session.h"
 #include "content/public/browser/media_session_observer.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "content/public/common/media_metadata.h"
 
+#if defined(OS_ANDROID)
+#include "base/android/scoped_java_ref.h"
+#endif  // defined(OS_ANDROID)
+
 class MediaSessionImplBrowserTest;
 
 namespace media {
 enum class MediaContentType;
 }  // namespace media
 
 namespace content {
 
 class AudioFocusDelegate;
 class AudioFocusManagerTest;
-class MediaSessionPlayerObserver;
 class MediaSessionImplStateObserver;
 class MediaSessionImplVisibilityBrowserTest;
 class MediaSessionObserver;
+class MediaSessionPlayerObserver;
+
+#if defined(OS_ANDROID)
+class MediaSessionAndroid;
+#endif  // defined(OS_ANDROID)
 
 // MediaSessionImpl is the implementation of MediaSession. It manages the media
 // session and audio focus for a given WebContents. It is requesting the audio
 // focus, pausing when requested by the system and dropping it on demand. The
 // audio focus can be of two types: Transient or Content. A Transient audio
 // focus will allow other players to duck instead of pausing and will be
 // declared as temporary to the system. A Content audio focus will not be
 // declared as temporary and will not allow other players to duck. If a given
 // WebContents can only have one audio focus at a time, it will be Content in
 // case of Transient and Content audio focus are both requested.
 // TODO(thakis,mlamouri): MediaSessionImpl isn't CONTENT_EXPORT'd because it
 // creates complicated build issues with WebContentsUserData being a
 // non-exported template, see https://crbug.com/589840. As a result, the class
 // uses CONTENT_EXPORT for methods that are being used from tests.
 // CONTENT_EXPORT should be moved back to the class when the Windows build will
 // work with it.
 class MediaSessionImpl : public MediaSession,
                          WebContentsObserver,
                          protected WebContentsUserData<MediaSessionImpl> {
  public:
   // Only visible to tests.
   enum class State { ACTIVE, SUSPENDED, INACTIVE };
 
   // Returns the MediaSessionImpl associated to this WebContents. Creates one if
   // none is currently available.
   CONTENT_EXPORT static MediaSessionImpl* Get(WebContents* web_contents);
 
   ~MediaSessionImpl() override;
 
+#if defined(OS_ANDROID)
+  static MediaSession* FromJavaMediaSession(
+      const base::android::JavaRef<jobject>& j_media_session);
+  MediaSessionAndroid* session_android() const {
+    return session_android_.get();
+  }
+#endif  // defined(OS_ANDROID)
+
   void AddObserver(MediaSessionObserver* observer);
   void RemoveObserver(MediaSessionObserver* observer);
 
   void SetMetadata(const base::Optional<MediaMetadata>& metadata);
   const base::Optional<MediaMetadata>& metadata() const { return metadata_; }
 
   // Adds the given player to the current media session. Returns whether the
   // player was successfully added. If it returns false, AddPlayer() should be
   // called again later.
   CONTENT_EXPORT bool AddPlayer(MediaSessionPlayerObserver* observer,
@@ skipping 151 matching lines @@
   // The ducking state of this media session. The initial value is |false|, and
   // is set to |true| after StartDucking(), and will be set to |false| after
   // StopDucking().
   bool is_ducking_;
 
   base::Optional<MediaMetadata> metadata_;
   base::CallbackList<void(State)> media_session_state_listeners_;
 
   base::ObserverList<MediaSessionObserver> observers_;
 
+#if defined(OS_ANDROID)
+  std::unique_ptr<MediaSessionAndroid> session_android_;
+#endif  // defined(OS_ANDROID)
+
   DISALLOW_COPY_AND_ASSIGN(MediaSessionImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_IMPL_H_