Pass media session id over IPC

content/common/media/media_player_messages_android.h

 // Copyright (c) 2012 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.
 
 // IPC messages for android media player.
 // Multiply-included message file, hence no include guard.
 
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 51 matching lines @@
 // Parameters to describe a media player
 IPC_STRUCT_BEGIN(MediaPlayerHostMsg_Initialize_Params)
   IPC_STRUCT_MEMBER(MediaPlayerHostMsg_Initialize_Type, type)
   IPC_STRUCT_MEMBER(int, player_id)
   IPC_STRUCT_MEMBER(int, demuxer_client_id)
   IPC_STRUCT_MEMBER(GURL, url)
   IPC_STRUCT_MEMBER(GURL, first_party_for_cookies)
   IPC_STRUCT_MEMBER(GURL, frame_url)
   IPC_STRUCT_MEMBER(bool, allow_credentials)
   IPC_STRUCT_MEMBER(int, delegate_id)
+  IPC_STRUCT_MEMBER(int, media_session_id)
 IPC_STRUCT_END()
 
 // Chrome for Android seek message sequence is:
 // 1. Renderer->Browser MediaPlayerHostMsg_Seek
 //    This is the beginning of actual seek flow in response to web app requests
 //    for seeks and browser MediaPlayerMsg_SeekRequests. With this message,
 //    the renderer asks browser to perform actual seek. At most one of these
 //    actual seeks will be in process between this message and renderer's later
 //    receipt of MediaPlayerMsg_SeekCompleted from the browser.
 // 2. Browser->Renderer MediaPlayerMsg_SeekCompleted
@@ skipping 192 matching lines @@
 
 #if defined(VIDEO_HOLE)
 // Notify the player about the external surface, requesting it if necessary.
 // |is_request| true if the player is requesting the external surface.
 // |rect| the boundary rectangle of the video element.
 IPC_MESSAGE_ROUTED3(MediaPlayerHostMsg_NotifyExternalSurface,
                     int /* player_id */,
                     bool /* is_request */,
                     gfx::RectF /* rect */)
 #endif  // defined(VIDEO_HOLE)