GLES1: glNormal3(f|x)

BUG=angleproject:2306

Change-Id: I42834078b14aaa20c4d4e6b67c097c810f5a17a3
Reviewed-on: https://chromium-review.googlesource.com/987297
Commit-Queue: Lingfeng Yang <lfy@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/validationES1.cpp b/src/libANGLE/validationES1.cpp
index 79decd4..739ad5c 100644
--- a/src/libANGLE/validationES1.cpp
+++ b/src/libANGLE/validationES1.cpp
@@ -417,13 +417,13 @@
 
 bool ValidateNormal3f(Context *context, GLfloat nx, GLfloat ny, GLfloat nz)
 {
-    UNIMPLEMENTED();
+    ANGLE_VALIDATE_IS_GLES1(context);
     return true;
 }
 
 bool ValidateNormal3x(Context *context, GLfixed nx, GLfixed ny, GLfixed nz)
 {
-    UNIMPLEMENTED();
+    ANGLE_VALIDATE_IS_GLES1(context);
     return true;
 }