Add enough ES 3.1 enums to support initializing the dEQP ES 3.1 tests.

BUG=angleproject:1442

Change-Id: Iece3efb272fdcbe004d4136129ba7bfe74ba5265
Reviewed-on: https://chromium-review.googlesource.com/405530
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/queryutils.cpp b/src/libANGLE/queryutils.cpp
index fdd2980..aa15ac6 100644
--- a/src/libANGLE/queryutils.cpp
+++ b/src/libANGLE/queryutils.cpp
@@ -156,6 +156,9 @@
         case GL_TEXTURE_MAX_LOD:
             texture->setMaxLod(ConvertToGLfloat(params[0]));
             break;
+        case GL_DEPTH_STENCIL_TEXTURE_MODE:
+            UNIMPLEMENTED();
+            break;
         case GL_TEXTURE_SRGB_DECODE_EXT:
             texture->setSRGBDecode(ConvertToGLenum(params[0]));
             break;