Initial work on making extensions work in incognito mode.

chrome/browser/gtk/browser_actions_toolbar_gtk.h

Index: chrome/browser/gtk/browser_actions_toolbar_gtk.h
diff --git a/chrome/browser/gtk/browser_actions_toolbar_gtk.h b/chrome/browser/gtk/browser_actions_toolbar_gtk.h
index 39daf7816668c6c3dad0b599080a51b4022ef7b7..1356320a1abf72d0624a88cb7bae19efba5220cb 100644
--- a/chrome/browser/gtk/browser_actions_toolbar_gtk.h
+++ b/chrome/browser/gtk/browser_actions_toolbar_gtk.h
@@ -69,6 +69,11 @@ class BrowserActionsToolbarGtk : public ExtensionToolbarModel::Observer {
   // 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);