Set callback interface on WebCDMSessionImpl after creation.

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 <string>
 
@@ skipping 32 matching lines @@
       const CreatePepperCdmCB& create_pepper_cdm_cb,
 #elif defined(ENABLE_BROWSER_CDMS)
       RendererCdmManager* manager,
 #endif
       const std::string& key_system,
       const GURL& security_origin);
 
   // Creates a new session and adds it to the internal map. The caller owns the
   // created session. RemoveSession() must be called when destroying it, if
   // RegisterSession() was called.
-  WebContentDecryptionModuleSessionImpl* CreateSession(
-      blink::WebContentDecryptionModuleSession::Client* client);
+  WebContentDecryptionModuleSessionImpl* CreateSession();
 
   // Adds a session to the internal map. Called once the session is successfully
   // initialized. Returns true if the session was registered, false if there is
   // already an existing session with the same |web_session_id|.
   bool RegisterSession(
       const std::string& web_session_id,
       base::WeakPtr<WebContentDecryptionModuleSessionImpl> session);
 
   // Removes a session from the internal map.
   void RemoveSession(const std::string& web_session_id);
@@ skipping 63 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<CdmSessionAdapter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CdmSessionAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CDM_SESSION_ADAPTER_H_