BrowserMediaPlayerManager manages MediaKeys objects.

media/base/media_keys.h

 // Copyright 2013 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 MEDIA_BASE_MEDIA_KEYS_H_
 #define MEDIA_BASE_MEDIA_KEYS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 64 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(MediaKeys);
 };
 
 // Key event callbacks. See the spec for details:
 // https://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#event-summary
 typedef base::Callback<
     void(uint32 session_id, const std::string& web_session_id)>
     SessionCreatedCB;
 
+// TODO(xhwang): Use GURL for |destination_url|. See http://crbug.com/372877
 typedef base::Callback<void(uint32 session_id,
                             const std::vector<uint8>& message,
                             const std::string& destination_url)>
     SessionMessageCB;
 
 typedef base::Callback<void(uint32 session_id)> SessionReadyCB;
 
 typedef base::Callback<void(uint32 session_id)> SessionClosedCB;
 
 typedef base::Callback<void(uint32 session_id,
                             media::MediaKeys::KeyError error_code,
                             uint32 system_code)> SessionErrorCB;
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_KEYS_H_