Revert of Set the request mode and the credentials mode of FetchEvent in the service worker correctly.

third_party/WebKit/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 "modules/fetch/FetchManager.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
@@ skipping 508 matching lines @@
     ASSERT(SchemeRegistry::shouldTreatURLSchemeAsSupportingFetchAPI(m_request->url().protocol()) || (m_request->url().protocolIs("blob") && !corsFlag && !corsPreflightFlag));
     // CORS preflight fetch procedure is implemented inside DocumentThreadableLoader.
 
     // "1. Let |HTTPRequest| be a copy of |request|, except that |HTTPRequest|'s
     //  body is a tee of |request|'s body."
     // We use ResourceRequest class for HTTPRequest.
     // FIXME: Support body.
     ResourceRequest request(m_request->url());
     request.setRequestContext(m_request->context());
     request.setHTTPMethod(m_request->method());
-    request.setFetchRequestMode(m_request->mode());
-    request.setFetchCredentialsMode(m_request->credentials());
     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() != HTTPNames::GET && m_request->method() != HTTPNames::HEAD) {
         if (m_request->buffer()) {
             request.setHTTPBody(m_request->buffer()->drainAsFormData());
         }
     }
@@ skipping 173 matching lines @@
     loader->dispose();
 }
 
 DEFINE_TRACE(FetchManager)
 {
     visitor->trace(m_executionContext);
     visitor->trace(m_loaders);
 }
 
 } // namespace blink