Add gpu_ipc_service_unittests to buildbot configs

testing/buildbot/chromium.mac.json

Index: testing/buildbot/chromium.mac.json
diff --git a/testing/buildbot/chromium.mac.json b/testing/buildbot/chromium.mac.json
index 7bf9782e1cc7302b733c02b79c91495ccb528a4f..3ab99de1d9b50ab27fcf285d1243b58903dd08bd 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -48,6 +48,7 @@
       "crypto_unittests",
       "gcm_unit_tests",
       "gn_unittests",
+      "gpu_ipc_service_unittests",
       "gpu_unittests",
       "ipc_tests",
       "jingle_unittests",
@@ -237,6 +238,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "gpu_ipc_service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "gpu_unittests"
       },
       {
@@ -562,6 +569,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "gpu_ipc_service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "gpu_unittests"
       },
       {
@@ -887,6 +900,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "gpu_ipc_service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "gpu_unittests"
       },
       {
@@ -1212,6 +1231,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "gpu_ipc_service_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "gpu_unittests"
       },
       {