[rAC] Do not re-create bubble window unnecessarily

chrome/browser/ui/cocoa/autofill/autofill_details_container.h

 // Copyright (c) 2013 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_COCOA_AUTOFILL_AUTOFILL_DETAILS_CONTAINER_H_
 #define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_DETAILS_CONTAINER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 18 matching lines @@
   base::scoped_nsobject<NSScrollView> scrollView_;
 
   // The individual detail sections.
   base::scoped_nsobject<NSMutableArray> details_;
 
   // An info bubble to display validation errors.
   base::scoped_nsobject<InfoBubbleView> errorBubble_;
 
   AutofillBubbleController* errorBubbleController_;
 
+  // The view the current error bubble is anchored to.
+  NSView* errorBubbleAnchorView_;
+
   autofill::AutofillDialogViewDelegate* delegate_;  // Not owned.
 }
 
 // Designated initializer.
 - (id)initWithDelegate:(autofill::AutofillDialogViewDelegate*)delegate;
 
 // Retrieve the container for the specified |section|.
 - (AutofillSectionContainer*)sectionForId:(autofill::DialogSection)section;
 
 // Called when |errorBubble_| needs to be updated.
@@ skipping 12 matching lines @@
 // Finds the first visible user input field. Returns nil if no field is found.
 // Looks at both direct input fields and input fields in suggestions.
 - (NSControl*)firstVisibleField;
 
 // Positions the scrollview so that given |field| is visible.
 - (void)scrollToView:(NSView*)field;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_DETAILS_CONTAINER_H_