Add finch builder to json files

Change-Id: If07ba5cf3cbe0750183bb5ce5e985c46878a268d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3002396
Auto-Submit: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Stephanie Kim <kimstephanie@google.com>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#903223}

testing/buildbot/chrome.json

@@ -2772,6 +2772,26 @@
       "chrome",
       "chrome/installer/linux"
     ],
+    "gtest_tests": [
+      {
+        "merge": {
+          "args": [],
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-18.04",
+              "pool": "chrome.tests"
+            }
+          ],
+          "service_account": "chrome-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "base_unittests",
+        "test_id_prefix": "ninja://base:base_unittests/"
+      }
+    ],
     "isolated_scripts": [
       {
         "isolate_name": "chrome_sizes",

testing/buildbot/test_suites.pyl

@@ -1429,6 +1429,12 @@
       }
     },
 
+    'finch_smoke_tests': {
+      # TODO(crbug.com/1227222): Change this to the actual finch smoke test
+      # once it exists.
+      'base_unittests': {},
+    },
+
     'fuchsia_common_gtests': {
       'absl_hardening_tests': {},
       'accessibility_unittests': {
@@ -4272,6 +4278,7 @@
       'unit_tests': {},
     },
 
+
     'linux_chromeos_lacros_gtests': {
       # Chrome OS (Ash) and Lacros only.
       'chromeos_unittests': {},

testing/buildbot/waterfalls.pyl

@@ -172,6 +172,7 @@
         ],
         'test_suites': {
           'isolated_scripts': 'chrome_sizes',
+          'gtest_tests': 'finch_smoke_tests',
         },
       },
       'linux-chromeos-chrome': {