Tidy up XMLHttpRequest::endLoading().

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 538 matching lines @@
   }
   return nullptr;
 }
 
 void FetchManager::Loader::loadSucceeded() {
   ASSERT(!m_failed);
 
   m_finished = true;
 
   if (document() && document()->frame() && document()->frame()->page() &&
-      m_responseHttpStatusCode >= 200 && m_responseHttpStatusCode < 300) {
+      FetchUtils::isOkStatus(m_responseHttpStatusCode)) {
     document()->frame()->page()->chromeClient().ajaxSucceeded(
         document()->frame());
   }
   InspectorInstrumentation::didFinishFetch(m_executionContext, this,
                                            m_request->method(),
                                            m_request->url().getString());
   notifyFinished();
 }
 
 void FetchManager::Loader::start() {
@@ skipping 361 matching lines @@
   m_loaders.remove(loader);
   loader->dispose();
 }
 
 DEFINE_TRACE(FetchManager) {
   visitor->trace(m_loaders);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink