Add a "Simplify Page" option to the print preview dialog

chrome/browser/printing/print_preview_dialog_controller.h

Index: chrome/browser/printing/print_preview_dialog_controller.h
diff --git a/chrome/browser/printing/print_preview_dialog_controller.h b/chrome/browser/printing/print_preview_dialog_controller.h
index 493e1c2e591e5127ec80cacf56edcf11ac7f493b..ad95403445125db8f1da69d491b12bc537f1ee4e 100644
--- a/chrome/browser/printing/print_preview_dialog_controller.h
+++ b/chrome/browser/printing/print_preview_dialog_controller.h
@@ -79,6 +79,11 @@ class PrintPreviewDialogController
     return is_creating_print_preview_dialog_;
   }
 
+  void AddProxyDialogForWebContents(content::WebContents* source,
+                                    content::WebContents* target);
+
+  void RemoveProxyDialogForWebContents(content::WebContents* source);
+
  private:
   friend class base::RefCounted<PrintPreviewDialogController>;
 
@@ -122,6 +127,8 @@ class PrintPreviewDialogController
   // Mapping between print preview dialog and the corresponding initiator.
   PrintPreviewDialogMap preview_dialog_map_;
 
+  PrintPreviewDialogMap proxied_dialog_map_;
+
   // A registrar for listening to notifications.
   content::NotificationRegistrar registrar_;