Revert of [Sync] Merge sync_unit_tests into components_unit_tests.

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 344f3bf3807488ffdcebe9578c8c1fdddb6fb0d9..269e79e547f696bdaabc5a7ccea4ef52fad276c7 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -514,6 +514,20 @@
         "test": "sql_unittests"
       },
       {
+        "override_isolate_target": "sync_unit_tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "android_devices": "4",
+              "device_os": "KTU84P",
+              "device_type": "hammerhead"
+            }
+          ]
+        },
+        "test": "sync_unit_tests"
+      },
+      {
         "override_isolate_target": "ui_android_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true,
@@ -727,6 +741,9 @@
         "test": "sql_unittests"
       },
       {
+        "test": "sync_unit_tests"
+      },
+      {
         "test": "ui_android_unittests"
       },
       {
@@ -933,6 +950,12 @@
           "can_use_on_swarming_builders": true
         },
         "test": "sql_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "sync_unit_tests"
       },
       {
         "swarming": {
@@ -1369,6 +1392,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "sync_unit_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "test_ime_unittests"
       },
       {
@@ -1802,6 +1831,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "sync_unit_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "test_ime_unittests"
       },
       {
@@ -2169,6 +2204,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "sync_unit_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_base_unittests"
       },
       {