Revert of Pass initDataType instead of contentType on OnNeedKey().

content/renderer/media/crypto/proxy_decryptor.h

 // Copyright 2013 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_CRYPTO_PROXY_DECRYPTOR_H_
 #define CONTENT_RENDERER_MEDIA_CRYPTO_PROXY_DECRYPTOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 54 matching lines @@
   // Returns the CDM ID associated with this object. May be kInvalidCdmId if no
   // CDM ID is associated, such as when Clear Key is used.
   int GetCdmId();
 #endif
 
   // Only call this once.
   bool InitializeCDM(const std::string& key_system,
                      const GURL& security_origin);
 
   // May only be called after InitializeCDM() succeeds.
-  bool GenerateKeyRequest(const std::string& init_data_type,
+  bool GenerateKeyRequest(const std::string& type,
                           const uint8* init_data,
                           int init_data_length);
   void AddKey(const uint8* key, int key_length,
               const uint8* init_data, int init_data_length,
               const std::string& session_id);
   void CancelKeyRequest(const std::string& session_id);
 
  private:
   // Helper function to create MediaKeys to handle the given |key_system|.
   scoped_ptr<media::MediaKeys> CreateMediaKeys(const std::string& key_system,
@@ skipping 47 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<ProxyDecryptor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyDecryptor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_PROXY_DECRYPTOR_H_