Make profiling lock global rather than per Target

Source/devtools/front_end/common/Object.js

Index: Source/devtools/front_end/common/Object.js
diff --git a/Source/devtools/front_end/common/Object.js b/Source/devtools/front_end/common/Object.js
index 2026873829793ebcbfdfd79ba8ef2ccaa858e9e1..8528e8e682b852437007a979140868e4137c69a4 100644
--- a/Source/devtools/front_end/common/Object.js
+++ b/Source/devtools/front_end/common/Object.js
@@ -145,51 +145,6 @@ WebInspector.Event.prototype = {
 }
 
 /**
- * @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()