DevTools: do not allow using 'this' before call into super.

third_party/WebKit/Source/devtools/front_end/ui/ContextMenu.js

 /*
  * Copyright (C) 2009 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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @constructor
- * @param {!WebInspector.ContextMenu} topLevelMenu
+ * @param {?WebInspector.ContextMenu} topLevelMenu
  * @param {string} type
  * @param {string=} label
  * @param {boolean=} disabled
  * @param {boolean=} checked
  */
 WebInspector.ContextMenuItem = function(topLevelMenu, type, label, disabled, checked)
 {
     this._type = type;
     this._label = label;
     this._disabled = disabled;
     this._checked = checked;
     this._contextMenu = topLevelMenu;
     if (type === "item" || type === "checkbox")
-        this._id = topLevelMenu._nextId();
+        this._id = topLevelMenu ? topLevelMenu._nextId() : 0;
 };
 
 WebInspector.ContextMenuItem.prototype = {
     /**
      * @return {number}
      */
     id: function()
     {
         return this._id;
     },
@@ skipping 48 matching lines @@
      */
     setShortcut: function(shortcut)
     {
         this._shortcut = shortcut;
     }
 };
 
 /**
  * @constructor
  * @extends {WebInspector.ContextMenuItem}
- * @param {!WebInspector.ContextMenu} topLevelMenu
+ * @param {?WebInspector.ContextMenu} topLevelMenu
  * @param {string=} label
  * @param {boolean=} disabled
  */
 WebInspector.ContextSubMenuItem = function(topLevelMenu, label, disabled)
 {
     WebInspector.ContextMenuItem.call(this, topLevelMenu, "subMenu", label, disabled);
     /** @type {!Array.<!WebInspector.ContextMenuItem>} */
     this._items = [];
 };
 
@@ skipping 167 matching lines @@
 /**
  * @constructor
  * @extends {WebInspector.ContextSubMenuItem}
  * @param {!Event} event
  * @param {boolean=} useSoftMenu
  * @param {number=} x
  * @param {number=} y
  */
 WebInspector.ContextMenu = function(event, useSoftMenu, x, y)
 {
-    WebInspector.ContextSubMenuItem.call(this, this, "");
+    WebInspector.ContextSubMenuItem.call(this, null, "");
+    this._contextMenu = this;
     /** @type {!Array.<!Promise.<!Array.<!WebInspector.ContextMenu.Provider>>>} */
     this._pendingPromises = [];
     /** @type {!Array<!Object>} */
     this._pendingTargets = [];
     this._event = event;
     this._useSoftMenu = !!useSoftMenu;
     this._x = x === undefined ? event.x : x;
     this._y = y === undefined ? event.y : y;
     this._handlers = {};
     this._id = 0;
@@ skipping 192 matching lines @@
 };
 
 WebInspector.ContextMenu.Provider.prototype = {
     /**
      * @param {!Event} event
      * @param {!WebInspector.ContextMenu} contextMenu
      * @param {!Object} target
      */
     appendApplicableItems: function(event, contextMenu, target) { }
 };