Use C++11 range-based loop in core/fetch

Source/core/fetch/FetchUtils.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 "core/fetch/FetchUtils.h"
 
 #include "platform/network/HTTPHeaderMap.h"
 #include "platform/network/HTTPParsers.h"
 #include "wtf/HashSet.h"
@@ skipping 89 matching lines @@
     }
 
     return false;
 }
 
 bool FetchUtils::isSimpleRequest(const String& method, const HTTPHeaderMap& headerMap)
 {
     if (!isSimpleMethod(method))
         return false;
 
-    HTTPHeaderMap::const_iterator end = headerMap.end();
-    for (HTTPHeaderMap::const_iterator it = headerMap.begin(); it != end; ++it) {
+    for (const auto& header : headerMap) {
         // Preflight is required for MIME types that can not be sent via form
         // submission.
-        if (!isSimpleHeader(it->key, it->value))
+        if (!isSimpleHeader(header.key, header.value))
             return false;
     }
 
     return true;
 }
 
 bool FetchUtils::isForbiddenMethod(const String& method)
 {
     // http://fetch.spec.whatwg.org/#forbidden-method
     // "A forbidden method is a method that is a byte case-insensitive match"
@@ skipping 25 matching lines @@
     // `Set-Cookie`, `Set-Cookie2`"
 
     return equalIgnoringCase(name, "set-cookie") || equalIgnoringCase(name, "set-cookie2");
 }
 
 bool FetchUtils::isSimpleOrForbiddenRequest(const String& method, const HTTPHeaderMap& headerMap)
 {
     if (!isSimpleMethod(method))
         return false;
 
-    HTTPHeaderMap::const_iterator end = headerMap.end();
-    for (HTTPHeaderMap::const_iterator it = headerMap.begin(); it != end; ++it) {
-        if (!isSimpleHeader(it->key, it->value) && !isForbiddenHeaderName(it->key))
+    for (const auto& header : headerMap) {
+        if (!isSimpleHeader(header.key, header.value) && !isForbiddenHeaderName(header.key))
             return false;
     }
 
     return true;
 }
 
 } // namespace blink