Convert remoting_unittests to run exclusively on Swarming

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 1a1dcaef3abf96369813dcb41425b133da0ce8dc..f5356649cfc941d9c616d40b941e099d5b320856 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -198,6 +198,9 @@
         "test": "printing_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "remoting_unittests"
       },
       {
@@ -424,6 +427,9 @@
         "test": "printing_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "remoting_unittests"
       },
       {
@@ -659,6 +665,9 @@
         "test": "printing_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "remoting_unittests"
       },
       {
@@ -894,6 +903,9 @@
         "test": "printing_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "remoting_unittests"
       },
       {
@@ -1130,6 +1142,9 @@
         "test": "printing_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "remoting_unittests"
       },
       {