DevTools: don't highlight custom elements in soft context menu.

Source/devtools/front_end/ui/SoftContextMenu.js

 /*
  * Copyright (C) 2011 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:
  * 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 104 matching lines @@
             return this._createSubMenu(item);
 
         var menuItemElement = createElementWithClass("div", "soft-context-menu-item");
         var checkMarkElement = menuItemElement.createChild("div", "checkmark");
         if (!item.checked)
             checkMarkElement.style.opacity = "0";
 
         if (item.element) {
             var wrapper = menuItemElement.createChild("div", "soft-context-menu-custom-item");
             wrapper.appendChild(item.element);
+            menuItemElement._isCustom = true;
             return menuItemElement;
         }
 
         menuItemElement.createTextChild(item.label);
         menuItemElement.createChild("span", "soft-context-menu-shortcut").textContent = item.shortcut;
 
         menuItemElement.addEventListener("mousedown", this._menuItemMouseDown.bind(this), false);
         menuItemElement.addEventListener("mouseup", this._menuItemMouseUp.bind(this), false);
 
         // Manually manage hover highlight since :hover does not work in case of click-and-hold menu invocation.
@@ skipping 131 matching lines @@
             this._highlightedMenuItemElement.classList.add("soft-context-menu-item-mouse-over");
             this._contextMenuElement.focus();
             if (this._highlightedMenuItemElement._subItems && !this._highlightedMenuItemElement._subMenuTimer)
                 this._highlightedMenuItemElement._subMenuTimer = setTimeout(this._showSubMenu.bind(this, this._highlightedMenuItemElement), 150);
         }
     },
 
     _highlightPrevious: function()
     {
         var menuItemElement = this._highlightedMenuItemElement ? this._highlightedMenuItemElement.previousSibling : this._contextMenuElement.lastChild;
-        while (menuItemElement && menuItemElement._isSeparator)
+        while (menuItemElement && (menuItemElement._isSeparator || menuItemElement._isCustom))
             menuItemElement = menuItemElement.previousSibling;
         if (menuItemElement)
             this._highlightMenuItem(menuItemElement);
     },
 
     _highlightNext: function()
     {
         var menuItemElement = this._highlightedMenuItemElement ? this._highlightedMenuItemElement.nextSibling : this._contextMenuElement.firstChild;
-        while (menuItemElement && menuItemElement._isSeparator)
+        while (menuItemElement && (menuItemElement._isSeparator || menuItemElement._isCustom))
             menuItemElement = menuItemElement.nextSibling;
         if (menuItemElement)
             this._highlightMenuItem(menuItemElement);
     },
 
     _menuKeyDown: function(event)
     {
         switch (event.keyIdentifier) {
         case "Up":
             this._highlightPrevious(); break;
@@ skipping 76 matching lines @@
 
     _discardSubMenus: function()
     {
         if (this._subMenu)
             this._subMenu._discardSubMenus();
         this._contextMenuElement.remove();
         if (this._parentMenu)
             delete this._parentMenu._subMenu;
     }
 }