FieldTrail - Added "delay_tcp_race": "true" as the default param when

testing/variations/fieldtrial_testing_config_chromeos.json

 {
     "AutofillClassifier": [
         {
             "group_name": "Enabled"
         }
     ],
     "AutofillFieldMetadata": [
         {
             "group_name": "Enabled"
         }
@@ skipping 17 matching lines @@
     "ChromeDashboard": [
         {
             "group_name": "Enabled"
         },
         {
             "group_name": "Default"
         }
     ],
     "ChromotingQUIC": [
         {
-            "group_name": "Enabled"
+            "group_name": "Enabled",
+            "params": {
+                "delay_tcp_race": "true"
+            }
         }
     ],
     "EnableGoogleCachedCopyTextExperiment": [
         {
             "group_name": "Button"
         }
     ],
     "EnableMediaRouter": [
         {
             "group_name": "Enabled"
@@ skipping 197 matching lines @@
     ],
     "use-new-media-cache": [
         {
             "enable_features": [
                 "use-new-media-cache"
             ],
             "group_name": "Enabled"
         }
     ]
 }