Fix include guards.

BUG=angle:733

Change-Id: I08b2c11c4831f1161c178c1842b10e807185aced
Reviewed-on: https://chromium-review.googlesource.com/230831
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/compiler/translator/DirectiveHandler.h b/src/compiler/translator/DirectiveHandler.h
index 0433c3b..5b591ab 100644
--- a/src/compiler/translator/DirectiveHandler.h
+++ b/src/compiler/translator/DirectiveHandler.h
@@ -4,8 +4,8 @@
 // found in the LICENSE file.
 //
 
-#ifndef COMPILER_DIRECTIVE_HANDLER_H_
-#define COMPILER_DIRECTIVE_HANDLER_H_
+#ifndef COMPILER_TRANSLATOR_DIRECTIVEHANDLER_H_
+#define COMPILER_TRANSLATOR_DIRECTIVEHANDLER_H_
 
 #include "compiler/translator/ExtensionBehavior.h"
 #include "compiler/translator/Pragma.h"
@@ -46,4 +46,4 @@
     int& mShaderVersion;
 };
 
-#endif  // COMPILER_DIRECTIVE_HANDLER_H_
+#endif  // COMPILER_TRANSLATOR_DIRECTIVEHANDLER_H_