Define and add Mac/Intel exp to CTS rolls

Defines the Mac/Intel experimental builder and adds it to the list
of builders used for CTS rolls.

The hardware used for testing is shared with the rest of Chromium,
and thus has a large number of machines available during the
qualification period. This should (hopefully) prevent long run times
during rolls that we were seeing on other experimental builders with
less capacity on CTS rolls.

Bug: chromium:326904538
Change-Id: Iedcced81c7369784a73d8a35d8d2c447091fdc03
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/177080
Commit-Queue: Brian Sheedy <bsheedy@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Auto-Submit: Brian Sheedy <bsheedy@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
Kokoro: Austin Eng <enga@chromium.org>
diff --git a/infra/config/global/generated/commit-queue.cfg b/infra/config/global/generated/commit-queue.cfg
index 061118f..383cf55 100644
--- a/infra/config/global/generated/commit-queue.cfg
+++ b/infra/config/global/generated/commit-queue.cfg
@@ -75,6 +75,10 @@
         includable_only: true
       }
       builders {
+        name: "chromium/try/dawn-try-mac-intel-exp"
+        includable_only: true
+      }
+      builders {
         name: "chromium/try/dawn-try-win-x64-intel-exp"
         includable_only: true
       }
diff --git a/infra/config/global/main.star b/infra/config/global/main.star
index b284cae..afb3d11 100755
--- a/infra/config/global/main.star
+++ b/infra/config/global/main.star
@@ -681,6 +681,12 @@
 
 luci.cq_tryjob_verifier(
     cq_group = "Dawn-CQ",
+    builder = "chromium:try/dawn-try-mac-intel-exp",
+    includable_only = True,
+)
+
+luci.cq_tryjob_verifier(
+    cq_group = "Dawn-CQ",
     builder = "chromium:try/dawn-try-win-x64-intel-exp",
     includable_only = True,
 )
diff --git a/tools/src/cmd/cts/config.json b/tools/src/cmd/cts/config.json
index f99f128..f71aad6 100644
--- a/tools/src/cmd/cts/config.json
+++ b/tools/src/cmd/cts/config.json
@@ -54,6 +54,11 @@
       "Bucket": "try",
       "Builder": "mac-dawn-rel"
     },
+    "Mac-x64-Intel-Experimental": {
+      "Project": "chromium",
+      "Bucket": "try",
+      "Builder": "dawn-try-mac-intel-exp"
+    },
     "Mac-Arm64": {
       "Project": "chromium",
       "Bucket": "try",