RSS feed support (part 1), 2nd attempt

chrome/browser/location_bar.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.
 
 // The LocationBar class is a virtual interface, defining access to the
 // window's location bar component.  This class exists so that cross-platform
 // components like the browser command system can talk to the platform
 // specific implementations of the location bar control.  It also allows the
 // location bar to be mocked for testing.
 
@@ skipping 26 matching lines @@
   // Accepts the current string of text entered in the location bar.
   virtual void AcceptInput() = 0;
 
   // Focuses and selects the contents of the location bar.
   virtual void FocusLocation() = 0;
 
   // Clears the location bar, inserts an annoying little "?" turd and sets
   // focus to it.
   virtual void FocusSearch() = 0;
 
+  // Update the state of the feed icon.
+  virtual void UpdateFeedIcon() = 0;
+
   // Saves the state of the location bar to the specified TabContents, so that
   // it can be restored later. (Done when switching tabs).
   virtual void SaveStateToContents(TabContents* contents) = 0;
 };
 
 #endif  // CHROME_BROWSER_LOCATION_BAR_H_