[Fetch] Request constructor should reflect body consumption.

Source/modules/fetch/Request.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/Request.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
@@ skipping 47 matching lines @@
     // Request object, and a new request otherwise."
     // "3. Set |request| to a new request whose url is |request|'s url, method
     // is |request|'s method, header list is a copy of |request|'s header list,
     // unsafe request flag is set, body is |request|'s body, client is entry
     // settings object, origin is entry settings object's origin, force Origin
     // header flag is set, same-origin data URL flag is set, referrer is client,
     // context is fetch, mode is |request|'s mode, credentials mode is
     // |request|'s credentials mode, and cache mode is |request|'s cache mode."
     FetchRequestData* request = createCopyOfFetchRequestDataForFetch(context, inputRequest ? inputRequest->request() : FetchRequestData::create());
 
+    if (inputRequest && inputRequest->blobDataHandle() && inputRequest->isBodyConsumed()) {
+        // Currently the only methods that can consume body data without
+        // setting 'body passed' flag consume entire body (e.g. text()). Thus
+        // we can set an empty blob to the new request instead of creating a
+        // draining stream.
+        // TODO(yhirano): Fix this once Request.body is introduced.
+        OwnPtr<BlobData> blobData = BlobData::create();
+        blobData->setContentType(inputRequest->blobDataHandle()->type());
+        request->setBlobDataHandle(BlobDataHandle::create(blobData.release(), 0));
+    }
+
     // "4. Let |fallbackMode| be null."
     // "5. Let |fallbackCredentials| be null."
     // "6. Let |fallbackCache| be null."
     // We don't use fallback values. We set these flags directly in below.
 
     // "7. If |input| is a string, run these substeps:"
     if (!inputRequest) {
         // "1. Let |parsedURL| be the result of parsing |input| with entry
         // settings object's API base URL."
         KURL parsedURL = context->completeURL(inputString);
@@ skipping 317 matching lines @@
 }
 
 DEFINE_TRACE(Request)
 {
     Body::trace(visitor);
     visitor->trace(m_request);
     visitor->trace(m_headers);
 }
 
 } // namespace blink