[Fetch API] Implement Request.formData and Response.formData.

third_party/WebKit/Source/modules/fetch/Response.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 Response_h
 #define Response_h
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "modules/ModulesExport.h"
@@ skipping 74 matching lines @@
     return response_->Buffer();
   }
   // Returns the BodyStreamBuffer of the internal response of |m_response| if
   // any. Otherwise, returns one of |m_response|.
   BodyStreamBuffer* InternalBodyBuffer() { return response_->InternalBuffer(); }
   const BodyStreamBuffer* InternalBodyBuffer() const {
     return response_->InternalBuffer();
   }
   bool bodyUsed() override;
 
+  String ContentType() const override;
   String MimeType() const override;
   String InternalMIMEType() const;
 
   const Vector<KURL>& InternalURLList() const;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit Response(ExecutionContext*);
   Response(ExecutionContext*, FetchResponseData*);
   Response(ExecutionContext*, FetchResponseData*, Headers*);
 
   void InstallBody();
   void RefreshBody(ScriptState*);
 
   const Member<FetchResponseData> response_;
   const Member<Headers> headers_;
 };
 
 }  // namespace blink
 
 #endif  // Response_h