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

third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp

 // 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.
 
 #include "modules/fetch/BodyStreamBuffer.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8HiddenValue.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
@@ skipping 27 matching lines @@
         m_buffer->endLoading();
         m_client->didFetchDataLoadedBlobHandle(std::move(blobDataHandle));
     }
 
     void didFetchDataLoadedArrayBuffer(DOMArrayBuffer* arrayBuffer) override
     {
         m_buffer->endLoading();
         m_client->didFetchDataLoadedArrayBuffer(arrayBuffer);
     }
 
+    void didFetchDataLoadedFormData(FormData* formData) override
+    {
+        m_buffer->endLoading();
+        m_client->didFetchDataLoadedFormData(formData);
+    }
+
     void didFetchDataLoadedString(const String& string) override
     {
         m_buffer->endLoading();
         m_client->didFetchDataLoadedString(string);
     }
 
     void didFetchDataLoadedStream() override
     {
         m_buffer->endLoading();
         m_client->didFetchDataLoadedStream();
@@ skipping 328 matching lines @@
     }
     if (isErrored)
         return new BytesConsumerForDataConsumerHandle(m_scriptState->getExecutionContext(), createFetchDataConsumerHandleFromWebHandle(createUnexpectedErrorDataConsumerHandle()));
 
     DCHECK(consumer);
     consumer->clearClient();
     return consumer;
 }
 
 } // namespace blink