Enable service_unittests on several bot configurations

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index bb609f85d85141f39da0ed5e97ca5fdd39c8d39c..5f6a780365758acbd52bb5f8cbc53364c59d2771 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -2193,6 +2193,38 @@
         "test": "sandbox_linux_unittests"
       },
       {
+        "override_isolate_target": "service_unittests",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "cipd_packages": [
+            {
+              "cipd_package": "infra/tools/luci/logdog/butler/${platform}",
+              "location": "bin",
+              "revision": "git_revision:dec8cc6fd715753846d0aca1693dc63844ea55d6"
+            }
+          ],
+          "dimension_sets": [
+            {
+              "android_devices": "4",
+              "device_os": "KTU84P",
+              "device_type": "hammerhead"
+            }
+          ],
+          "hard_timeout": 120,
+          "output_links": [
+            {
+              "link": [
+                "https://luci-logdog.appspot.com/v/?s",
+                "=android%2Fswarming%2Flogcats%2F",
+                "${TASK_ID}%2F%2B%2Funified_logcats"
+              ],
+              "name": "shard #${SHARD_INDEX} logcats"
+            }
+          ]
+        },
+        "test": "service_unittests"
+      },
+      {
         "override_isolate_target": "sql_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true,
@@ -3119,6 +3151,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "skia_unittests"
       },
       {
@@ -3719,6 +3757,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "skia_unittests"
       },
       {
@@ -4116,6 +4160,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "skia_unittests"
       },
       {