Convert performance monitor to the subscription model.

third_party/WebKit/Source/devtools/front_end/sdk/ConsoleModel.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
     this._messages = [];
     /** @type {!Map<number, !WebInspector.ConsoleMessage>} */
     this._messageByExceptionId = new Map();
     this._warnings = 0;
     this._errors = 0;
     this._revokedErrors = 0;
     this._logAgent = logAgent;
     if (this._logAgent) {
       target.registerLogDispatcher(new WebInspector.LogDispatcher(this));
       this._logAgent.enable();
-      if (!InspectorFrontendHost.isUnderTest())
-        this._logAgent.setReportViolationsEnabled(true);
+      if (!InspectorFrontendHost.isUnderTest()) {
+        this._logAgent.startViolationsReport([
+            {name: 'longTask', threshold: 50 },

[caseq, 2016/11/09 00:41:12]

nit: I'd extract a static var for it and call it ...ViolationConfig

[pfeldman, 2016/11/09 01:39:14]

Acknowledged.

+            {name: 'longLayout', threshold: 30},
+            {name: 'blockedEvent', threshold: 100}]);
+      }
     }
   }
 
   /**
    * @param {!WebInspector.ExecutionContext} executionContext
    * @param {string} text
    * @param {boolean=} useCommandLineAPI
    */
   static evaluateCommandInConsole(executionContext, text, useCommandLineAPI) {
     var target = executionContext.target();
@@ skipping 572 matching lines @@
    */
   _commandEvaluated(event) {
     this.dispatchEventToListeners(WebInspector.ConsoleModel.Events.CommandEvaluated, event.data);
   }
 };
 
 /**
  * @type {!WebInspector.MultitargetConsoleModel}
  */
 WebInspector.multitargetConsoleModel;