CL for src perf tryjob to run v8.infinite_scroll_tbmv2 benchmark on all-mac platform(s)

testing/variations/fieldtrial_testing_config_mac.json

 {
     "AutofillClassifier": [
         {
             "group_name": "Enabled"
         }
     ],
     "AutofillFieldMetadata": [
         {
             "group_name": "Enabled"
         }
@@ skipping 191 matching lines @@
     "OutOfProcessPac": [
         {
             "group_name": "Enabled"
         }
     ],
     "PageRevisitInstrumentation": [
         {
             "group_name": "Enabled"
         }
     ],
-    "ParseHTMLOnMainThread": [
-        {
-            "enable_features": [
-                "ParseHTMLOnMainThread"
-            ],
-            "group_name": "Enabled",
-            "params": {
-                "parseHTMLOnMainThreadCoalesceChunks": "false",
-                "parseHTMLOnMainThreadSyncTokenize": "false"
-            }
-        }
-    ],
     "PassiveDocumentEventListeners": [
         {
             "enable_features": [
                 "PassiveDocumentEventListeners"
             ],
             "group_name": "Enabled"
         }
     ],
     "PassiveEventListenersDueToFling": [
         {
@@ skipping 332 matching lines @@
     ],
     "use-new-media-cache": [
         {
             "enable_features": [
                 "use-new-media-cache"
             ],
             "group_name": "Enabled"
         }
     ]
 }