GLES1: glMultMatrix(f|x)

BUG=angleproject:2306

Change-Id: I178b051c23da51d8eaf24c2a0df97f01ae5f3aaa
Reviewed-on: https://chromium-review.googlesource.com/1002914
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 c176392..160c31f 100644
--- a/src/libANGLE/validationES1.cpp
+++ b/src/libANGLE/validationES1.cpp
@@ -386,13 +386,13 @@
 
 bool ValidateMultMatrixf(Context *context, const GLfloat *m)
 {
-    UNIMPLEMENTED();
+    ANGLE_VALIDATE_IS_GLES1(context);
     return true;
 }
 
 bool ValidateMultMatrixx(Context *context, const GLfixed *m)
 {
-    UNIMPLEMENTED();
+    ANGLE_VALIDATE_IS_GLES1(context);
     return true;
 }