Change the behavior of the [X] Save details to Wallet checkbox notification to:

chrome/browser/ui/autofill/autofill_dialog_controller.h

 // Copyright (c) 2012 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_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_
 
 #include <vector>
 
 #include "base/string16.h"
@@ skipping 132 matching lines @@
                                           bool was_edit) = 0;
 
   // The view forwards keypresses in text inputs. Returns true if there should
   // be no further processing of the event.
   virtual bool HandleKeyPressEventInInput(
       const content::NativeWebKeyboardEvent& event) = 0;
 
   // Called when focus has changed position within the view.
   virtual void FocusMoved() = 0;
 
+  // Called when a checkbox in the notification area has changed its state.
+  virtual void CheckboxStateChanged(DialogNotification::Type type,

[Evan Stade, 2013/04/08 18:07:05]

nit: can you call this NotificationCheckboxStateChanged?

also, this does not belong under the "Detail Inputs" group

[Dan Beam, 2013/04/09 01:08:07]

Done.

+                                    bool checked) = 0;
+
   // Miscellany ----------------------------------------------------------------
 
   // Called when the view has been closed.
   virtual void ViewClosed() = 0;
 
   // Returns dialog notifications that the view should currently be showing in
   // order from top to bottom.
   virtual std::vector<DialogNotification> CurrentNotifications() const = 0;
 
   // Begins the flow to sign into Wallet.
@@ skipping 18 matching lines @@
   // The web contents that prompted the dialog.
   virtual content::WebContents* web_contents() = 0;
 
  protected:
   virtual ~AutofillDialogController();
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_CONTROLLER_H_