Print preview: Disable the right context menu items in print preview.

chrome/browser/tab_contents/render_view_context_menu.h

Index: chrome/browser/tab_contents/render_view_context_menu.h
===================================================================
--- chrome/browser/tab_contents/render_view_context_menu.h	(revision 113923)
+++ chrome/browser/tab_contents/render_view_context_menu.h	(working copy)
@@ -23,6 +23,7 @@
 #include "webkit/glue/window_open_disposition.h"
 
 class ExtensionMenuItem;
+class PrintPreviewContextMenuObserver;
 class Profile;
 class RenderViewHost;
 class TabContents;
@@ -268,6 +269,9 @@
   // An observer that handles a 'spell-checker options' submenu.
   scoped_ptr<SpellCheckerSubMenuObserver> spellchecker_submenu_observer_;
 
+  // An observer that disables menu items when print preview is active.
+  scoped_ptr<PrintPreviewContextMenuObserver> print_preview_menu_observer_;
+
   // Our observers.
   mutable ObserverList<RenderViewContextMenuObserver> observers_;