Infra: Adding tests to example builder for Noogler talk

Change-Id: I5d7699f0892b4236532536b770805711518cbfe2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570738
Auto-Submit: Gary Tong <gatong@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833461}

testing/buildbot/chromium.fyi.json

@@ -53805,6 +53805,33 @@
   "linux-example-builder": {
     "additional_compile_targets": [
       "chrome"
+    ],
+    "gtest_tests": [
+      {
+        "merge": {
+          "args": [],
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "base_unittests",
+        "test_id_prefix": "ninja://base:base_unittests/"
+      },
+      {
+        "merge": {
+          "args": [],
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com",
+          "shards": 3
+        },
+        "test": "interactive_ui_tests",
+        "test_id_prefix": "ninja://chrome/test:interactive_ui_tests/"
+      }
     ]
   },
   "linux-fieldtrial-rel": {

testing/buildbot/test_suites.pyl

@@ -3791,6 +3791,15 @@
       'wayland_client_perftests': {},
     },
 
+    'linux_example_builder_gtests': {
+      'base_unittests': {},
+      'interactive_ui_tests': {
+        'swarming': {
+          'shards': 3,
+        },
+      },
+    },
+
     'linux_flavor_specific_chromium_gtests': {
       # Android, Chrome OS and Linux
       'sandbox_linux_unittests': {},

testing/buildbot/waterfalls.pyl

@@ -2686,6 +2686,9 @@
         'additional_compile_targets': [
           'chrome',
         ],
+        'test_suites': {
+          'gtest_tests': 'linux_example_builder_gtests',
+        },
       },
       'linux-fieldtrial-rel': {
         'mixins': [