[Sync] Merge sync_unit_tests into components_unit_tests, take 3.

testing/buildbot/chromium.win.json

Index: testing/buildbot/chromium.win.json
diff --git a/testing/buildbot/chromium.win.json b/testing/buildbot/chromium.win.json
index 40dc30263055a637817fa92f58a843e0722c0087..9cd38f865e19ef86622b53542d792edb81d77806 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -418,12 +418,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -875,12 +869,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -1363,12 +1351,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {
@@ -1765,12 +1747,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "sync_unit_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "ui_base_unittests"
       },
       {