tint: Add matrix short names

Fixed: tint:1786
Change-Id: Ifa3acb2fc1792b392ccb4555bde840f5038eef2c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/114141
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
diff --git a/src/tint/resolver/resolver_test_helper.h b/src/tint/resolver/resolver_test_helper.h
index 12d8fe3..2515a02 100644
--- a/src/tint/resolver/resolver_test_helper.h
+++ b/src/tint/resolver/resolver_test_helper.h
@@ -149,16 +149,22 @@
 using mat2x3 = mat<2, 3, T>;
 
 template <typename T>
+using mat2x4 = mat<2, 4, T>;
+
+template <typename T>
 using mat3x2 = mat<3, 2, T>;
 
 template <typename T>
-using mat2x4 = mat<2, 4, T>;
+using mat3x3 = mat<3, 3, T>;
+
+template <typename T>
+using mat3x4 = mat<3, 4, T>;
 
 template <typename T>
 using mat4x2 = mat<4, 2, T>;
 
 template <typename T>
-using mat3x3 = mat<3, 3, T>;
+using mat4x3 = mat<4, 3, T>;
 
 template <typename T>
 using mat4x4 = mat<4, 4, T>;