Check InitDateType is supported by key system when creating session

media/blink/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 MEDIA_BLINK_CDM_SESSION_ADAPTER_H_
 #define MEDIA_BLINK_CDM_SESSION_ADAPTER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 71 matching lines @@
   // Removes stored session data associated with the session specified by
   // |session_id|.
   void RemoveSession(const std::string& session_id,
                      scoped_ptr<SimpleCdmPromise> promise);
 
   // Returns the CdmContext associated with |media_keys_|.
   // TODO(jrummell): Figure out lifetimes, as WMPI may still use the decryptor
   // after WebContentDecryptionModule is freed. http://crbug.com/330324
   CdmContext* GetCdmContext();
 
+  // Returns the key system name.
+  const std::string& GetKeySystem() const;
+
   // Returns a prefix to use for UMAs.
   const std::string& GetKeySystemUMAPrefix() const;
 
  private:
   friend class base::RefCounted<CdmSessionAdapter>;
   typedef base::hash_map<std::string,
                          base::WeakPtr<WebContentDecryptionModuleSessionImpl> >
       SessionMap;
 
   ~CdmSessionAdapter();
@@ skipping 15 matching lines @@
                       const std::string& error_message);
 
   // Helper function of the callbacks.
   WebContentDecryptionModuleSessionImpl* GetSession(
       const std::string& session_id);
 
   scoped_ptr<MediaKeys> media_keys_;
 
   SessionMap sessions_;
 
+  std::string key_system_;
   std::string key_system_uma_prefix_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<CdmSessionAdapter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CdmSessionAdapter);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_CDM_SESSION_ADAPTER_H_