DevTools: enable by default disableAgentsWhenProfile experiment

Source/devtools/front_end/sdk/TracingManager.js

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * @constructor
  * @extends {WebInspector.Object}
  * @implements {WebInspector.TargetManager.Observer}
@@ skipping 73 matching lines @@
 
     /**
      * @param {string} categoryFilter
      * @param {string} options
      * @param {function(?string)=} callback
      */
     start: function(categoryFilter, options, callback)
     {
         if (this._active)
             return;
-        WebInspector.profilingLock().acquire();
-        this._shouldReleaseLock = true;
+        WebInspector.targetManager.suspendAllTargets();
         var bufferUsageReportingIntervalMs = 500;
         TracingAgent.start(categoryFilter, options, bufferUsageReportingIntervalMs, callback);
         this._active = true;
         this.dispatchEventToListeners(WebInspector.TracingManager.Events.TracingStarted);
     },
 
     stop: function()
     {
         if (!this._active)
             return;
         TracingAgent.end(this._onStop.bind(this));
-        if (this._shouldReleaseLock) {
-            this._shouldReleaseLock = false;
-            WebInspector.profilingLock().release();
-        }
+        WebInspector.targetManager.resumeAllTargets();
     },
 
     _onStop: function()
     {
         if (!this._active)
             return;
         this.dispatchEventToListeners(WebInspector.TracingManager.Events.TracingStopped);
         this._active = false;
     },
 
@@ skipping 25 matching lines @@
     dataCollected: function(data)
     {
         this._tracingManager._eventsCollected(data);
     },
 
     tracingComplete: function()
     {
         this._tracingManager._tracingComplete();
     }
 }