Fix sky include guards to match Chromium style

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

Index: sky/engine/bindings/core/v8/BindingSecurity.h
diff --git a/sky/engine/bindings/core/v8/BindingSecurity.h b/sky/engine/bindings/core/v8/BindingSecurity.h
index 493dd4f7d140d9747ca51373efbd98ba4cce6a4f..4d6fd980cd1fb6ae21d3ff6ea0f2db085b9b10ec 100644
--- a/sky/engine/bindings/core/v8/BindingSecurity.h
+++ b/sky/engine/bindings/core/v8/BindingSecurity.h
@@ -28,8 +28,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef BindingSecurity_h
-#define BindingSecurity_h
+#ifndef SKY_ENGINE_BINDINGS_CORE_V8_BINDINGSECURITY_H_
+#define SKY_ENGINE_BINDINGS_CORE_V8_BINDINGSECURITY_H_
 
 // FIXME: The LocalFrame include should not be necessary, clients should be including it where they use it.
 #include "sky/engine/core/frame/LocalFrame.h"
@@ -56,4 +56,4 @@ public:
 
 }
 
-#endif
+#endif  // SKY_ENGINE_BINDINGS_CORE_V8_BINDINGSECURITY_H_