DevTools: fix disposing of main debugger script mappings

third_party/WebKit/Source/devtools/front_end/bindings/DefaultScriptMapping.js

 /*
  * Copyright (C) 2012 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 21 matching lines @@
  * @constructor
  * @implements {WebInspector.DebuggerSourceMapping}
  * @param {!WebInspector.DebuggerModel} debuggerModel
  * @param {!WebInspector.Workspace} workspace
  * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
  */
 WebInspector.DefaultScriptMapping = function(debuggerModel, workspace, debuggerWorkspaceBinding)
 {
     this._debuggerModel = debuggerModel;
     this._debuggerWorkspaceBinding = debuggerWorkspaceBinding;
-    this._workspace = workspace;
-    this._projectId = WebInspector.DefaultScriptMapping.projectIdForTarget(debuggerModel.target());
-    this._project = new WebInspector.ContentProviderBasedProject(this._workspace, this._projectId, WebInspector.projectTypes.Debugger, "");
-    debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
-    this._debuggerReset();
+    var projectId = WebInspector.DefaultScriptMapping.projectIdForTarget(debuggerModel.target());
+    this._project = new WebInspector.ContentProviderBasedProject(workspace, projectId, WebInspector.projectTypes.Debugger, "");
+    /** @type {!Map.<string, !WebInspector.UISourceCode>} */
+    this._uiSourceCodeForScriptId = new Map();
+    /** @type {!Map.<!WebInspector.UISourceCode, string>} */
+    this._scriptIdForUISourceCode = new Map();
+    this._eventListeners = [
+        debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this)
+    ];
 }
 
 WebInspector.DefaultScriptMapping._scriptSymbol = Symbol("symbol");
 
 /**
  * @param {!WebInspector.UISourceCode} uiSourceCode
  * @return {?WebInspector.Script}
  */
 WebInspector.DefaultScriptMapping.scriptForUISourceCode = function(uiSourceCode)
 {
@@ skipping 67 matching lines @@
      * @param {number} lineNumber
      * @return {boolean}
      */
     uiLineHasMapping: function(uiSourceCode, lineNumber)
     {
         return true;
     },
 
     _debuggerReset: function()
     {
-        /** @type {!Map.<string, !WebInspector.UISourceCode>} */
-        this._uiSourceCodeForScriptId = new Map();
-        this._scriptIdForUISourceCode = new Map();
+        this._uiSourceCodeForScriptId.clear();
+        this._scriptIdForUISourceCode.clear();
         this._project.reset();
     },
 
     dispose: function()
     {
+        WebInspector.EventTarget.removeEventListeners(this._eventListeners);
+        this._debuggerReset();
         this._project.dispose();
     }
 }
 
 /**
  * @param {!WebInspector.Target} target
  * @return {string}
  */
 WebInspector.DefaultScriptMapping.projectIdForTarget = function(target)
 {
     return "debugger:" + target.id();
 }