Fix sky include guards to match Chromium style

sky/engine/core/fetch/FetchUtils.h

 // 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.
 
-#ifndef FetchUtils_h
-#define FetchUtils_h
+#ifndef SKY_ENGINE_CORE_FETCH_FETCHUTILS_H_
+#define SKY_ENGINE_CORE_FETCH_FETCHUTILS_H_
 
 #include "sky/engine/wtf/Forward.h"
 
 namespace blink {
 
 class HTTPHeaderMap;
 
 class FetchUtils {
 public:
     static bool isSimpleMethod(const String& method);
     static bool isSimpleHeader(const AtomicString& name, const AtomicString& value);
     static bool isSimpleRequest(const String& method, const HTTPHeaderMap&);
     static bool isForbiddenMethod(const String& method);
     static bool isUsefulMethod(const String& method) { return !isForbiddenMethod(method); }
     static bool isForbiddenHeaderName(const String& name);
     static bool isForbiddenResponseHeaderName(const String& name);
     static bool isSimpleOrForbiddenRequest(const String& method, const HTTPHeaderMap&);
 
 private:
     FetchUtils(); // = delete;
 };
 
 } // namespace blink
 
-#endif
+#endif  // SKY_ENGINE_CORE_FETCH_FETCHUTILS_H_