Fix sky include guards to match Chromium style

sky/engine/core/dom/TemplateContentDocumentFragment.h

 /*
  * Copyright (C) 2012 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * 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 TemplateContentDocumentFragment_h
-#define TemplateContentDocumentFragment_h
+#ifndef SKY_ENGINE_CORE_DOM_TEMPLATECONTENTDOCUMENTFRAGMENT_H_
+#define SKY_ENGINE_CORE_DOM_TEMPLATECONTENTDOCUMENTFRAGMENT_H_
 
 #include "sky/engine/core/dom/DocumentFragment.h"
 
 namespace blink {
 
 class TemplateContentDocumentFragment final : public DocumentFragment {
 public:
     static PassRefPtr<TemplateContentDocumentFragment> create(Document& document, Element* host)
     {
         return adoptRef(new TemplateContentDocumentFragment(document, host));
@@ skipping 11 matching lines @@
     {
     }
 
     virtual bool isTemplateContent() const override { return true; }
 
     RawPtr<Element> m_host;
 };
 
 } // namespace blink
 
-#endif // TemplateContentDocumentFragment_h
+#endif  // SKY_ENGINE_CORE_DOM_TEMPLATECONTENTDOCUMENTFRAGMENT_H_