Make profiling lock global rather than per Target

Source/devtools/front_end/common/Object.js

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 127 matching lines @@
      */
     consume: function(preventDefault)
     {
         this.stopPropagation();
         if (preventDefault)
             this.preventDefault();
     }
 }
 
 /**
- * @constructor
- * @extends {WebInspector.Object}
- */
-WebInspector.Lock = function()
-{
-    this._count = 0; // Reentrant.
-}
-
-/**
- * @enum {string}
- */
-WebInspector.Lock.Events = {
-    StateChanged: "StateChanged"
-}
-
-WebInspector.Lock.prototype = {
-    /**
-     * @return {boolean}
-     */
-    isAcquired: function()
-    {
-        return !!this._count;
-    },
-
-    acquire: function()
-    {
-        if (++this._count === 1)
-            this.dispatchEventToListeners(WebInspector.Lock.Events.StateChanged);
-    },
-
-    release: function()
-    {
-        --this._count;
-        if (this._count < 0) {
-            console.error("WebInspector.Lock acquire/release calls are unbalanced " + new Error().stack);
-            return;
-        }
-        if (!this._count)
-            this.dispatchEventToListeners(WebInspector.Lock.Events.StateChanged);
-    },
-
-    __proto__: WebInspector.Object.prototype
-}
-
-/**
  * @interface
  */
 WebInspector.EventTarget = function()
 {
 }
 
 WebInspector.EventTarget.prototype = {
     /**
      * @param {string} eventType
      * @param {function(!WebInspector.Event)} listener
@@ skipping 16 matching lines @@
      */
     hasEventListeners: function(eventType) { },
 
     /**
      * @param {string} eventType
      * @param {*=} eventData
      * @return {boolean}
      */
     dispatchEventToListeners: function(eventType, eventData) { },
 }