Add "type" in GenerateKeyRequest() and OnNeedKey().

media/base/decryptor.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.
 
 #ifndef MEDIA_BASE_DECRYPTOR_H_
 #define MEDIA_BASE_DECRYPTOR_H_
 
 #include <list>
 #include <string>
 
@@ skipping 46 matching lines @@
   };
 
   enum StreamType {
     kAudio,
     kVideo
   };
 
   Decryptor();
   virtual ~Decryptor();
 
-  // Generates a key request for the |key_system| with |init_data| provided.
+  // Generates a key request for the |key_system| with |type| and
+  // |init_data| provided.
   // Returns true if generating key request succeeded, false otherwise.
   // Note: AddKey() and CancelKeyRequest() should only be called after
   // GenerateKeyRequest() returns true.
   virtual bool GenerateKeyRequest(const std::string& key_system,
+                                  const std::string& type,
                                   const uint8* init_data,
                                   int init_data_length) = 0;
 
   // Adds a |key| to the |key_system|. The |key| is not limited to a decryption
   // key. It can be any data that the key system accepts, such as a license.
   // If multiple calls of this function set different keys for the same
   // key ID, the older key will be replaced by the newer key.
   virtual void AddKey(const std::string& key_system,
                       const uint8* key,
                       int key_length,
@@ skipping 110 matching lines @@
   // The decoder can be reinitialized after it is uninitialized.
   virtual void DeinitializeDecoder(StreamType stream_type) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Decryptor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DECRYPTOR_H_