Fix tonic include guards

tonic/dart_converter_wtf.h

 // Copyright 2015 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 SKY_ENGINE_TONIC_DART_CONVERTER_WTF_H_
-#define SKY_ENGINE_TONIC_DART_CONVERTER_WTF_H_
+#ifndef TONIC_DART_CONVERTER_WTF_H_
+#define TONIC_DART_CONVERTER_WTF_H_
 
 #include <string>
 #include "sky/engine/wtf/text/StringUTF8Adaptor.h"
 #include "sky/engine/wtf/text/WTFString.h"
 #include "tonic/dart_converter.h"
 #include "tonic/dart_string.h"
 #include "tonic/dart_string_cache.h"
 #include "tonic/dart_value.h"
 
 namespace tonic {
@@ skipping 184 matching lines @@
 struct DartConverter<RefPtr<T>> {
   static Dart_Handle ToDart(RefPtr<T> val) {
     return DartConverter<T*>::ToDart(val.get());
   }
 
   static RefPtr<T> FromDart(Dart_Handle handle) {
     return DartConverter<T*>::FromDart(handle);
   }
 };
 
-#endif  // SKY_ENGINE_TONIC_DART_CONVERTER_WTF_H_
+#endif  // TONIC_DART_CONVERTER_WTF_H_