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/libANGLE/formatutils.h b/src/libANGLE/formatutils.h
index ae56c47..97ea89a 100644
--- a/src/libANGLE/formatutils.h
+++ b/src/libANGLE/formatutils.h
@@ -6,8 +6,8 @@
 
 // formatutils.h: Queries for GL image formats.
 
-#ifndef LIBGLESV2_FORMATUTILS_H_
-#define LIBGLESV2_FORMATUTILS_H_
+#ifndef LIBANGLE_FORMATUTILS_H_
+#define LIBANGLE_FORMATUTILS_H_
 
 #include "libANGLE/Caps.h"
 #include "libANGLE/angletypes.h"
@@ -103,4 +103,4 @@
 
 }
 
-#endif // LIBGLESV2_FORMATUTILS_H_
+#endif // LIBANGLE_FORMATUTILS_H_