BrowserCdmManager: remove CDMs on correct thread on RenderFrameDeleted.

content/browser/media/cdm/browser_cdm_manager.h

 // Copyright 2014 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_CDM_BROWSER_CDM_MANAGER_H_
 #define CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 90 matching lines @@
 
   void SendSessionError(int render_frame_id, int cdm_id, uint32 session_id);
 
   // Adds a new CDM identified by |cdm_id| for the given |key_system| and
   // |security_origin|.
   void AddCdm(int render_frame_id,
               int cdm_id,
               const std::string& key_system,
               const GURL& security_origin);
 
+  // Removes all CDMs associated with |render_frame_id|.
+  void RemoveCdmsForFrame(int render_frame_id);

[damienv1, 2014/11/16 00:00:46]

nit: Would rather name it: RemoveAllCdmForFrame (Cdms looks a bit weird
especially since we don't use "CDMs").

[gunsch, 2014/11/17 16:17:37]

Done.

+
   // Removes the CDM with the specified id.
   void RemoveCdm(uint64 id);
 
   // If |permitted| is false, it does nothing but send
   // |CdmMsg_SessionError| IPC message.
   // The primary use case is infobar permission callback, i.e., when infobar
   // can decide user's intention either from interacting with the actual info
   // bar or from the saved preference.
   void CreateSessionIfPermitted(int render_frame_id,
                                 int cdm_id,
@@ skipping 20 matching lines @@
 
   // Map of callbacks to cancel the permission request.
   std::map<uint64, base::Closure> cdm_cancel_permission_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserCdmManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_