Activate dawn M117

R=morawand@google.com
No-Try: true
Change-Id: I6e287bbc1434c954eb1ec14434c72373dace3417
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/145900
Owners-Override: Wanda Mora <morawand@google.com>
Reviewed-by: Wanda Mora <morawand@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Austin Eng <enga@chromium.org>
diff --git a/infra/config/global/milestones.json b/infra/config/global/milestones.json
index fbe212e..80dc477 100644
--- a/infra/config/global/milestones.json
+++ b/infra/config/global/milestones.json
@@ -47,5 +47,15 @@
             "mac",
             "win"
         ]
+    },
+    "117": {
+        "name": "m117",
+        "chromium_project": "chromium-m117",
+        "ref": "refs/heads/chromium/5938",
+        "platforms": [
+            "linux",
+            "mac",
+            "win"
+        ]
     }
 }
\ No newline at end of file