[Sync] Merge sync_unit_tests into components_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 e24c31878486a3affd92397adf51af8472632135..05e39bfae6134f9cdb5f42b3cc7ed83b2130b91d 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -13,7 +13,6 @@
       "printing_unittests",
       "skia_unittests",
       "sql_unittests",
-      "sync_unit_tests",
       "ui_base_unittests",
       "unit_tests",
       "url_unittests"
@@ -295,12 +294,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -634,12 +627,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -974,12 +961,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -1302,12 +1283,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {