DevTools: make profiling lock global rather than per Target

Source/devtools/front_end/sdk/CSSStyleModel.js

 /*
  * Copyright (C) 2010 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 33 matching lines @@
     this._domModel.addEventListener(WebInspector.DOMModel.Events.UndoRedoCompleted, this._undoRedoCompleted, this);
     target.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, this._mainFrameNavigated, this);
     target.registerCSSDispatcher(new WebInspector.CSSDispatcher(this));
     this._agent.enable(this._wasEnabled.bind(this));
     /** @type {!StringMap.<!WebInspector.CSSStyleSheetHeader>} */
     this._styleSheetIdToHeader = new StringMap();
     /** @type {!StringMap.<!Object.<!PageAgent.FrameId, !Array.<!CSSAgent.StyleSheetId>>>} */
     this._styleSheetIdsForURL = new StringMap();
 
     if (WebInspector.experimentsSettings.disableAgentsWhenProfile.isEnabled())
-        target.profilingLock.addEventListener(WebInspector.Lock.Events.StateChanged, this._profilingStateChanged, this);
+        WebInspector.profilingLock().addEventListener(WebInspector.Lock.Events.StateChanged, this._profilingStateChanged, this);
 }
 
 WebInspector.CSSStyleModel.PseudoStatePropertyName = "pseudoState";
 
 /**
  * @param {!WebInspector.CSSStyleModel} cssModel
  * @param {!Array.<!CSSAgent.RuleMatch>|undefined} matchArray
  * @return {!Array.<!WebInspector.CSSRule>}
  */
 WebInspector.CSSStyleModel.parseRuleMatchArrayPayload = function(cssModel, matchArray)
@@ skipping 13 matching lines @@
     StyleSheetChanged: "StyleSheetChanged",
     StyleSheetRemoved: "StyleSheetRemoved",
     MediaQueryResultChanged: "MediaQueryResultChanged",
 }
 
 WebInspector.CSSStyleModel.MediaTypes = ["all", "braille", "embossed", "handheld", "print", "projection", "screen", "speech", "tty", "tv"];
 
 WebInspector.CSSStyleModel.prototype = {
     _profilingStateChanged: function()
     {
-        if (this.target().profilingLock.isAcquired()) {
+        if (WebInspector.profilingLock().isAcquired()) {
             this._agent.disable();
             this._isEnabled = false;
             this._resetStyleSheets();
         } else {
             this._agent.enable(this._wasEnabled.bind(this));
         }
     },
 
     /**
      * @param {function(!Array.<!WebInspector.CSSMedia>)} userCallback
@@ skipping 1543 matching lines @@
             for (var i = 0; i < callbacks.length; ++i)
                 callbacks[i](computedStyle);
         }
     }
 }
 
 /**
  * @type {!WebInspector.CSSStyleModel}
  */
 WebInspector.cssModel;