Fix sky include guards to match Chromium style

sky/engine/core/testing/URLTestHelpers.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.
  *     * 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 URLTestHelpers_h
-#define URLTestHelpers_h
+#ifndef SKY_ENGINE_CORE_TESTING_URLTESTHELPERS_H_
+#define SKY_ENGINE_CORE_TESTING_URLTESTHELPERS_H_
 
 #include "sky/engine/platform/weborigin/KURL.h"
 #include "sky/engine/public/platform/WebString.h"
 
 namespace blink {
 
 class WebURL;
 
 namespace URLTestHelpers {
 
 inline blink::KURL toKURL(const std::string& url)
 {
     WTF::String wtfString(url.c_str());
     return blink::KURL(blink::ParsedURLString, wtfString);
 }
 
 // Helper functions for mock URLs. These functions set up the desired URL and mimeType, with a 200 OK return status.
 // For the mock URL, fullURL == baseURL + fileName.
 // For the actual file path:  <WebKit root directory> + relativeBaseDirectory + fileName,
 // or, if the relative base directory is not specified:  <WebKit root directory> + fileName.
 //
 void registerMockedURLFromBaseURL(const WebString& baseURL, const WebString& fileName, const WebString& mimeType = WebString::fromUTF8("text/html"));
 void registerMockedURLLoad(const WebURL& fullURL, const WebString& fileName, const WebString& mimeType = WebString::fromUTF8("text/html"));
 void registerMockedURLLoad(const WebURL& fullURL, const WebString& fileName, const WebString& relativeBaseDirectory, const WebString& mimeType);
 
 } // namespace URLTestHelpers
 } // namespace blink
 
-#endif
+#endif  // SKY_ENGINE_CORE_TESTING_URLTESTHELPERS_H_