Index: content/browser/media/session/media_session_observer.h |
diff --git a/content/browser/media/session/media_session_observer.h b/content/browser/media/session/media_session_observer.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ad22725aa8dbea197763c8082f4d787e980a8af7 |
--- /dev/null |
+++ b/content/browser/media/session/media_session_observer.h |
@@ -0,0 +1,42 @@ |
+// Copyright 2016 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_OBSERVER_H_ |
+#define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_OBSERVER_H_ |
+ |
+#include "base/macros.h" |
+#include "base/optional.h" |
+#include "content/public/common/media_metadata.h" |
+ |
+namespace content { |
+ |
+class MediaSession; |
+ |
+class MediaSessionObserver { |
+ public: |
+ explicit MediaSessionObserver(MediaSession* session); |
+ virtual ~MediaSessionObserver() = default; |
whywhat
2016/10/20 15:38:33
if you "unobserve" in dtor, you can probably remov
Zhiqiang Zhang (Slow)
2016/10/20 16:22:32
Yes. It is now in the new patch.
|
+ |
+ MediaSession* session() { return session_; } |
+ |
+ virtual void MediaSessionDisconnected() {} |
+ |
+ virtual void MediaSessionStateChanged( |
+ bool is_controllable, bool is_suspended) {} |
+ |
+ virtual void MediaSessionMetadataChanged( |
+ const base::Optional<MediaMetadata>& metadata) {} |
+ |
+ private: |
+ void Observe(MediaSession* session); |
+ |
+ // Weak pointer to MediaSession, this class is owned by MediaSession. |
+ MediaSession* session_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(MediaSessionObserver); |
+}; |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_OBSERVER_H_ |