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 146 matching lines @@
   // 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.
   virtual void StartSignInFlow() = 0;
 
   // Marks the signin flow into Wallet complete.
   virtual void EndSignInFlow() = 0;
 
+  // Called when a checkbox in the notification area has changed its state.
+  virtual void NotificationCheckboxStateChanged(DialogNotification::Type type,
+                                                bool checked) = 0;
+
   // A legal document link has been clicked.
   virtual void LegalDocumentLinkClicked(const ui::Range& range) = 0;
 
   // Called when the view has been cancelled.
   virtual void OnCancel() = 0;
 
   // Called when the view has been accepted. This could be to submit the payment
   // info or to handle a required action.
   virtual void OnAccept() = 0;
 
   // Returns the profile for this dialog.
   virtual Profile* profile() = 0;
 
   // 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_