Refactor security-icon code to a more general form

chrome/browser/cocoa/autocomplete_text_field.h

 // Copyright (c) 2009 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_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_
 #define CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_
 
 #import <Cocoa/Cocoa.h>
 
 @class AutocompleteTextFieldCell;
@@ skipping 32 matching lines @@
   // Returns the appropriate "Paste and Go" or "Paste and Search"
   // context menu string, depending on what is currently in the
   // clipboard.  Must not be called unless CanPasteAndGo() returns
   // true.
   virtual int GetPasteActionStringId() = 0;
 
   // Called when the user initiates a "paste and go" or "paste and
   // search" into |field_|.
   virtual void OnPasteAndGo() = 0;
 
-  // Called when the user clicks the hint icon (i.e. the security icon) in the
-  // location bar.
-  virtual void OnSecurityIconClicked() = 0;
-
   // Called when the field's frame changes.
   virtual void OnFrameChanged() = 0;
 };
 
 @interface AutocompleteTextField : NSTextField {
  @private
   AutocompleteTextFieldObserver* observer_;  // weak, owned by location bar.
 }
 
 @property AutocompleteTextFieldObserver* observer;
 
 // Convenience method to return the cell, casted appropriately.
 - (AutocompleteTextFieldCell*)autocompleteTextFieldCell;
 
 // If the keyword, keyword hint, or search hint changed, then the
 // field editor may need to be repositioned.
 - (void)resetFieldEditorFrameIfNeeded;
 
 // Returns the amount of the field's width which is not being taken up
 // by the text contents.  May be negative if the contents are large
 // enough to scroll.
 - (CGFloat)availableDecorationWidth;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_