Initial work on making extensions work in incognito mode.

chrome/browser/gtk/browser_actions_toolbar_gtk.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GTK_BROWSER_ACTIONS_TOOLBAR_GTK_H_
 #define CHROME_BROWSER_GTK_BROWSER_ACTIONS_TOOLBAR_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include <map>
@@ skipping 51 matching lines @@
   // Delete resources associated with UI for a browser action.
   void RemoveButtonForExtension(Extension* extension);
 
   // Change the visibility of widget() based on whether we have any buttons
   // to show.
   void UpdateVisibility();
 
   // Hide the extension popup, if any.
   void HidePopup();
 
+  // Returns true if this extension should be shown in this toolbar. This can
+  // return false if we are in an incognito window and the extension is disabled
+  // for incognito.
+  bool ShouldDisplayBrowserAction(Extension* extension);
+
   // ExtensionToolbarModel::Observer implementation.
   virtual void BrowserActionAdded(Extension* extension, int index);
   virtual void BrowserActionRemoved(Extension* extension);
   virtual void BrowserActionMoved(Extension* extension, int index);
 
   // Called by the BrowserActionButton in response to drag-begin.
   void DragStarted(BrowserActionButton* button, GdkDragContext* drag_context);
 
   static gboolean OnDragMotionThunk(GtkWidget* widget,
                                     GdkDragContext* drag_context,
@@ skipping 54 matching lines @@
   // a chrome button and related functionality. There should be one entry
   // for every extension that has a browser action.
   typedef std::map<std::string, linked_ptr<BrowserActionButton> >
       ExtensionButtonMap;
   ExtensionButtonMap extension_button_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserActionsToolbarGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_BROWSER_ACTIONS_TOOLBAR_GTK_H_