Implement request's redirect mode and RequestRedirect for Fetch

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 267 matching lines @@
     // "- |request|'s mode is |CORS-with-forced-preflight|.
     // "- |request|'s unsafe request flag is set and either |request|'s method
     // is not a simple method or a header in |request|'s header list is not a
     // simple header"
     if (m_request->mode() == WebURLRequest::FetchRequestModeCORSWithForcedPreflight
         || (m_request->unsafeRequestFlag()
             && (!FetchUtils::isSimpleMethod(m_request->method())
                 || m_request->headerList()->containsNonSimpleHeader()))) {
         // "Set |request|'s response tainting to |CORS|."
         m_request->setResponseTainting(FetchRequestData::CORSTainting);
+        m_request->setRedirect(WebURLRequest::FetchRedirectModeError);
         // "The result of performing an HTTP fetch using |request| with the
         // |CORS flag| and |CORS preflight flag| set."
         performHTTPFetch(true, true);
         return;
     }
 
     // "- Otherwise
     //     Set |request|'s response tainting to |CORS|."
     m_request->setResponseTainting(FetchRequestData::CORSTainting);
     // "The result of performing an HTTP fetch using |request| with the
@@ skipping 56 matching lines @@
 {
     ASSERT(m_request->url().protocolIsInHTTPFamily());
     // 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.setFetchRedirectMode(m_request->redirect());
     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") {
         RefPtr<BlobDataHandle> blobDataHandle = m_request->blobDataHandle();
         if (blobDataHandle.get()) {
             RefPtr<FormData> httpBody(FormData::create());
@@ skipping 121 matching lines @@
 
 DEFINE_TRACE(FetchManager)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_executionContext);
     visitor->trace(m_loaders);
 #endif
 }
 
 } // namespace blink