Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/cdm_session_adapter.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_RENDERER_MEDIA_CDM_SESSION_ADAPTER_H_
 #define CONTENT_RENDERER_MEDIA_CDM_SESSION_ADAPTER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 47 matching lines @@
 
   // Releases the session specified by |session_id|.
   void ReleaseSession(uint32 session_id);
 
   // Returns the Decryptor associated with this CDM. May be NULL if no
   // Decryptor is associated with the MediaKeys object.
   // TODO(jrummell): Figure out lifetimes, as WMPI may still use the decryptor
   // after WebContentDecryptionModule is freed. http://crbug.com/330324
   media::Decryptor* GetDecryptor();
 
+  // Returns the CDM ID associated with this object. May be kInvalidCdmId if no

[ddorwin, 2014/03/11 04:06:33]

Why does any of the Blink code (here and WCDM_impl) need this?

[ddorwin, 2014/03/11 18:05:14]

As discussed, this is only for being able to tell the IPC player what IPC CDM to
use.
Maybe we can pass this back up from Initialize() and make WCDMI store the value,
avoiding passing it

[xhwang, 2014/03/12 01:07:52]

Done.

+  // CDM ID is associated.
+  int GetCdmId();
+
  private:
   friend class base::RefCounted<CdmSessionAdapter>;
   typedef std::map<uint32, WebContentDecryptionModuleSessionImpl*> SessionMap;
 
   ~CdmSessionAdapter();
 
   // Callbacks for firing session events.
   void OnSessionCreated(uint32 session_id, const std::string& web_session_id);
   void OnSessionMessage(uint32 session_id,
                         const std::vector<uint8>& message,
@@ skipping 15 matching lines @@
 
   // Session ID should be unique per renderer process for debugging purposes.
   static uint32 next_session_id_;
 
   DISALLOW_COPY_AND_ASSIGN(CdmSessionAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CDM_SESSION_ADAPTER_H_