Fix sky include guards to match Chromium style

sky/engine/platform/heap/Handle.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 Handle_h
-#define Handle_h
+#ifndef SKY_ENGINE_PLATFORM_HEAP_HANDLE_H_
+#define SKY_ENGINE_PLATFORM_HEAP_HANDLE_H_
 
 #include "sky/engine/wtf/StdLibExtras.h"
 
 //
 // STACK_ALLOCATED(): Use if the object is only stack allocated.
 //
 // DISALLOW_ALLOCATION(): Cannot be allocated with new operators but can
 // be a part object.
 //
 // ALLOW_ONLY_INLINE_ALLOCATION(): Allows only placement new operator.
@@ skipping 43 matching lines @@
     public:                                                    \
         virtual ~type();                                       \
     private:
 
 #define DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(type) \
     type::~type() { }
 
 #define DEFINE_STATIC_REF_WILL_BE_PERSISTENT(type, name, arguments) \
     DEFINE_STATIC_REF(type, name, arguments)
 
-#endif
+#endif  // SKY_ENGINE_PLATFORM_HEAP_HANDLE_H_