Update chrome-gpu public allowlists

Updates the allowlists for the chrome-gpu corpus in the chrome-public
instance. Both a Mac GPU and the values reported by SwANGLE weren't
added in the past, so results could be erroneously hidden from the
public instance.

Change-Id: I74268c433bd6cbd08a18c76d9cc7d4759e9b69c2
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/558576
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Auto-Submit: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
diff --git a/golden/k8s-instances/chrome-public/chrome-public-frontend.json5 b/golden/k8s-instances/chrome-public/chrome-public-frontend.json5
index b89aa49..30d827c 100644
--- a/golden/k8s-instances/chrome-public/chrome-public-frontend.json5
+++ b/golden/k8s-instances/chrome-public/chrome-public-frontend.json5
@@ -46,6 +46,7 @@
         "0x1cb3",
         "0x2184",
         "0x3e92",
+        "0x3e9b",
         "0x5912",
         "0x6613",
         "0x679e",
@@ -54,6 +55,7 @@
         "0xa2e",
         "0xd26",
         "0xfe9",
+        "0xffff",
         "None",
       ],
       device_string: [ // Set by mobile devices
@@ -77,6 +79,7 @@
         "0x10de",
         "0x1af4",
         "0x8086",
+        "0xffff",
         "None",
       ],
     },