[Fetch API] Send request body as a FormData.

Source/modules/fetch/FetchManager.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 "config.h"
 #include "modules/fetch/FetchManager.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 340 matching lines @@
     // FIXME: Support body.
     ResourceRequest request(m_request->url());
     request.setRequestContext(m_request->context());
     request.setHTTPMethod(m_request->method());
     const Vector<OwnPtr<FetchHeaderList::Header>>& list = m_request->headerList()->list();
     for (size_t i = 0; i < list.size(); ++i) {
         request.addHTTPHeaderField(AtomicString(list[i]->first), AtomicString(list[i]->second));
     }
 
     if (m_request->method() != "GET" && m_request->method() != "HEAD") {
-        if (BodyStreamBuffer* buffer = m_request->buffer()) {
-            RefPtr<BlobDataHandle> blobDataHandle = buffer->drainAsBlobDataHandle(FetchDataConsumerHandle::Reader::AllowBlobWithInvalidSize);
-            RefPtr<FormData> httpBody(FormData::create());
-            if (blobDataHandle)
-                httpBody->appendBlob(blobDataHandle->uuid(), blobDataHandle);
-            request.setHTTPBody(httpBody);
+        if (m_request->buffer()->hasBody()) {
+            request.setHTTPBody(m_request->buffer()->drainAsFormData());
         }
     }
     request.setFetchRedirectMode(m_request->redirect());
     request.setUseStreamOnResponse(true);
 
     // "2. Append `Referer`/empty byte sequence, if |HTTPRequest|'s |referrer|
     // is none, and `Referer`/|HTTPRequest|'s referrer, serialized and utf-8
     // encoded, otherwise, to HTTPRequest's header list.
     // We set the referrer using workerGlobalScope's URL in
     // WorkerThreadableLoader.
@@ skipping 111 matching lines @@
 
 DEFINE_TRACE(FetchManager)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_executionContext);
     visitor->trace(m_loaders);
 #endif
 }
 
 } // namespace blink