Updating Mac buildbots to run gcm_unit_tests

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 86dbd40737a764453fc5451b1f4c3f99a6d7102d..73b8e27df84222fc4f8ad8e5add1152908b57c77 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -24,6 +24,7 @@
   "Mac10.6 Tests (2)": {
     "gtest_tests": [
       "components_unittests",
+      "gcm_unit_tests",
       "gfx_unittests",
       "google_apis_unittests",
       "ipc_tests",
@@ -67,6 +68,7 @@
   "Mac10.7 Tests (2)": {
     "gtest_tests": [
       "components_unittests",
+      "gcm_unit_tests",
       "gfx_unittests",
       "google_apis_unittests",
       "ipc_tests",
@@ -121,6 +123,7 @@
   "Mac 10.6 Tests (dbg)(4)": {
     "gtest_tests": [
       "components_unittests",
+      "gcm_unit_tests",
       "google_apis_unittests",
       "message_center_unittests",
       "ipc_tests",
@@ -168,6 +171,7 @@
   "Mac 10.7 Tests (dbg)(4)": {
     "gtest_tests": [
       "components_unittests",
+      "gcm_unit_tests",
       "google_apis_unittests",
       "message_center_unittests",
       "ipc_tests",