Fix sky include guards to match Chromium style

sky/engine/platform/text/LineEnding.h

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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.
@@ skipping 11 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 LineEnding_h
-#define LineEnding_h
+#ifndef SKY_ENGINE_PLATFORM_TEXT_LINEENDING_H_
+#define SKY_ENGINE_PLATFORM_TEXT_LINEENDING_H_
 
 #include "sky/engine/platform/PlatformExport.h"
 #include "sky/engine/wtf/Forward.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 // Normalize all line-endings in the given string to CRLF.
 PLATFORM_EXPORT CString normalizeLineEndingsToCRLF(const CString& from);
 
 // Normalize all line-endings in the given string to CR and append the result to the given buffer.
 PLATFORM_EXPORT void normalizeLineEndingsToCR(const CString& from, Vector<char>& result);
 
 // Normalize all line-endings in the given string to LF and append the result to the given buffer.
 PLATFORM_EXPORT void normalizeLineEndingsToLF(const CString& from, Vector<char>& result);
 
 // Normalize all line-endings in the given string to the native line-endings and append the result to the given buffer.
 // (Normalize to CRLF on Windows and normalize to LF on all other platforms.)
 PLATFORM_EXPORT void normalizeLineEndingsToNative(const CString& from, Vector<char>& result);
 
 } // namespace blink
 
-#endif // LineEnding_h
+#endif  // SKY_ENGINE_PLATFORM_TEXT_LINEENDING_H_