Emit a console warning when blocking event listener is delayed for too long

third_party/WebKit/Source/devtools/front_end/main/module.json

 {
     "extensions": [
         {
             "type": "@WebInspector.AppProvider",
             "className": "WebInspector.SimpleAppProvider",
             "order": 10
         },
         {
             "type": "@WebInspector.ContextMenu.Provider",
             "contextTypes": ["WebInspector.UISourceCode", "WebInspector.Resource", "WebInspector.NetworkRequest", "Node"],
@@ skipping 281 matching lines @@
         },
         {
             "type": "setting",
             "category": "Appearance",
             "title": "Disable paused state overlay",
             "settingName": "disablePausedStateOverlay",
             "settingType": "boolean",
             "defaultValue": false
         },
         {
+            "type": "setting",
+            "category": "Console",
+            "title": "Report input events blocked for too long",
+            "settingName": "blockedEventsWarningEnabled",
+            "settingType": "boolean",
+            "defaultValue": true
+        },
+        {
             "type": "@WebInspector.SettingUI",
             "category": "Extensions",
             "className": "WebInspector.HandlerRegistry.OpenAnchorLocationSettingUI"
         },
         {
             "type": "@WebInspector.SettingUI",
             "category": "Elements",
             "order": 3,
             "className": "WebInspector.ShowMetricsRulersSettingUI"
         },
@@ skipping 44 matching lines @@
         "Connections.js",
         "Main.js"
     ],
     "resources": [
         "errorWarningCounter.css",
         "remoteDebuggingTerminatedScreen.css",
         "renderingOptions.css",
         "targetCrashedScreen.css"
     ]
 }