Fix sky include guards to match Chromium style

sky/engine/bindings/core/v8/V8PersistentValueMap.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef V8PersistentValueMap_h
-#define V8PersistentValueMap_h
+#ifndef SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_
+#define SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_
 
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/text/StringHash.h"
 #include "v8/include/v8-util.h"
 #include "v8/include/v8.h"
 
 namespace blink {
 
 /**
  * A Traits class for v8::PersistentValueMap that uses wtf/HashMap as a
@@ skipping 76 matching lines @@
  */
 template<class KeyType, class ValueType, bool is_weak = true>
 class V8PersistentValueMap : public v8::PersistentValueMap<KeyType, ValueType, V8PersistentValueMapTraits<KeyType, ValueType, is_weak> > {
 public:
     typedef V8PersistentValueMapTraits<KeyType, ValueType, is_weak> Traits;
     explicit V8PersistentValueMap(v8::Isolate* isolate) : v8::PersistentValueMap<KeyType, ValueType, Traits>(isolate) { }
 };
 
 } // namespace blink
 
-#endif // V8PersistentValueMap_h
+#endif  // SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_