added a menu item for turning on GfxListboxes and GfxComboboxes and the the setting prefs

r=dcone b=18895

webshell/tests/viewer/nsBrowserWindow.cpp

@@ -923,6 +923,22 @@ nsBrowserWindow::DispatchMenuItem(PRInt32 aID)
     }
     break;
 
+  case VIEWER_GFX_LISTBOX_ON: 
+    SetBoolPref("nglayout.widget.gfxlistbox", PR_TRUE);
+    break;
+
+  case VIEWER_GFX_LISTBOX_OFF: 
+    SetBoolPref("nglayout.widget.gfxlistbox", PR_FALSE);
+    break;
+
+  case VIEWER_GFX_COMBOBOX_ON: 
+    SetBoolPref("nglayout.widget.gfxcombobox", PR_TRUE);
+    break;
+
+  case VIEWER_GFX_COMBOBOX_OFF: 
+    SetBoolPref("nglayout.widget.gfxcombobox", PR_FALSE);
+    break;
+
 #ifdef PURIFY
   case VIEWER_PURIFY_SHOW_NEW_LEAKS:
   case VIEWER_PURIFY_SHOW_ALL_LEAKS:

webshell/tests/viewer/resources.h

@@ -82,6 +82,10 @@
 #define VIEWER_USE_DTD_MODE         40079
 #define VIEWER_STANDARD_MODE        40080
 #define VIEWER_NAV_QUIRKS_MODE      40081
+#define VIEWER_GFX_LISTBOX_ON       40082
+#define VIEWER_GFX_LISTBOX_OFF      40083
+#define VIEWER_GFX_COMBOBOX_ON      40084
+#define VIEWER_GFX_COMBOBOX_OFF     40085
 
 #define VIEWER_TOGGLE_PAINT_FLASHING         40200
 #define VIEWER_TOGGLE_PAINT_DUMPING          40210

webshell/tests/viewer/viewer.rc

@@ -140,6 +140,16 @@ VIEWER MENU DISCARDABLE
       MENUITEM "Gfx Off", VIEWER_GFX_SCROLLBARS_OFF
       MENUITEM "Gfx On", VIEWER_GFX_SCROLLBARS_ON
     }
+    POPUP "&Gfx Comboxbox Mode Pref"
+    {
+      MENUITEM "Gfx Off", VIEWER_GFX_COMBOBOX_OFF
+      MENUITEM "Gfx On", VIEWER_GFX_COMBOBOX_ON
+    }
+    POPUP "&Gfx Listbox Mode Pref"
+    {
+      MENUITEM "Gfx Off", VIEWER_GFX_LISTBOX_OFF
+      MENUITEM "Gfx On", VIEWER_GFX_LISTBOX_ON
+    }
   }
   POPUP "&URLs"
   {