Disable printing context menus on the print preview page.

chrome/browser/printing/print_preview_tab_controller.h

 // Copyright (c) 2010 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_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_
 #pragma once
 
 #include <map>
 
@@ skipping 25 matching lines @@
   // Get/Create the print preview tab for |initiator_tab|.
   // |browser_window_id| is the browser window containing |initiator_tab|.
   TabContents* GetOrCreatePreviewTab(
       TabContents* initiator_tab, int browser_window_id);
 
   // Notification observer implementation.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
+  // Returns true if |tab| is a print preview tab.
+  static bool IsPrintPreviewTab(TabContents* tab);
+
  private:
   friend class base::RefCounted<PrintPreviewTabController>;
 
-  // Returns true if |tab| is a print preview tab.
-  bool IsPrintPreviewTab(TabContents* tab);
-
   // Returns initiator tab for |preview_tab|.
   // Returns NULL if no initiator tab exists for |preview_tab|.
   TabContents* GetInitiatorTab(TabContents* preview_tab);
 
   // Returns preview tab for |tab|.
   // Returns |tab| if |tab| is a preview tab.
   // Returns NULL if no preview tab exists for |tab|.
   TabContents* GetPrintPreviewForTab(TabContents* tab);
 
   // Creates a new print preview tab.
@@ skipping 16 matching lines @@
   // True if the controller is waiting for a new preview tab via
   // NavigationType::NEW_PAGE.
   bool waiting_for_new_preview_page_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewTabController);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_