Add onfocuschange to the Extended Search API, with associated isFocused attribute.

chrome/browser/ui/search/instant_controller.h

 // Copyright 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_SEARCH_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 485 matching lines @@
   // See comments on the getter above.
   content::PageTransition last_transition_type_;
 
   // True if the last match passed to Update() was a search (versus a URL).
   // Used to ensure that the overlay page is committable.
   bool last_match_was_search_;
 
   // Omnibox focus state.
   OmniboxFocusState omnibox_focus_state_;
 
+  // The reason for the most recent omnibox focus change.
+  OmniboxFocusChangeReason omnibox_focus_change_reason_;
+
   // The search model mode for the active tab.
   SearchMode search_mode_;
 
   // Current omnibox popup bounds.
   gfx::Rect popup_bounds_;
 
   // Last popup bounds passed to the page.
   gfx::Rect last_popup_bounds_;
 
   // The start-edge margin and width of the omnibox, used by the page to align
@@ skipping 28 matching lines @@
   // Used for Top Sites async retrieval.
   base::WeakPtrFactory<InstantController> weak_ptr_factory_;
 
   // Used to get notifications about Most Visted changes.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_INSTANT_CONTROLLER_H_