Convert ui_touch_selection_unittests to run exclusively on Swarming

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 eb3640d27b6a780f4e049b6bfc7c1f9193d0b0c7..f3df003aef7f416acf4a58691136b2376cd2032d 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -211,6 +211,9 @@
         "test": "ui_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_touch_selection_unittests"
       },
       {
@@ -473,6 +476,9 @@
         "test": "ui_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_touch_selection_unittests"
       },
       {
@@ -854,6 +860,9 @@
         "test": "ui_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_touch_selection_unittests"
       },
       {
@@ -1095,6 +1104,9 @@
         "test": "ui_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_touch_selection_unittests"
       },
       {
@@ -1494,6 +1506,9 @@
         "test": "ui_base_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_touch_selection_unittests"
       },
       {