[Fetch] Request.clone() should reflect body consumption.

Source/modules/fetch/Request.cpp

Index: Source/modules/fetch/Request.cpp
diff --git a/Source/modules/fetch/Request.cpp b/Source/modules/fetch/Request.cpp
index 9d58ec8a8ad4d3c3babbf26e690863c707aee1b7..ae64c155a42a0b4aa2100ef9769662457d1b3ab6 100644
--- a/Source/modules/fetch/Request.cpp
+++ b/Source/modules/fetch/Request.cpp
@@ -337,6 +337,17 @@ Request* Request::clone(ExceptionState& exceptionState) const
     }
 
     FetchRequestData* request = m_request->clone();
+    if (blobDataHandle() && 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(blobDataHandle()->type());
+        request->setBlobDataHandle(BlobDataHandle::create(blobData.release(), 0));
+    }
+
     Headers* headers = Headers::create(request->headerList());
     headers->setGuard(m_headers->guard());
     Request* r = new Request(executionContext(), request, headers);