InstantExtended: add back focus() API call.

chrome/renderer/searchbox/searchbox.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_RENDERER_SEARCHBOX_SEARCHBOX_H_
 #define CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 48 matching lines @@
 
   // Returns the latest most visited items sent by the browser.
   void GetMostVisitedItems(
       std::vector<InstantMostVisitedItemIDPair>* items) const;
 
   // If the |most_visited_item_id| is found in the cache, sets |item| to it
   // and returns true.
   bool GetMostVisitedItemWithID(InstantRestrictedID most_visited_item_id,
                                 InstantMostVisitedItem* item) const;
 
+  // Sends ChromeViewHostMsg_FocusOmnibox to the browser.
+  void Focus();
+
   // Sends ChromeViewHostMsg_SearchBoxNavigate to the browser.
   void NavigateToURL(const GURL& url,
                      content::PageTransition transition,
                      WindowOpenDisposition disposition,
                      bool is_search_type);
 
   // Sends ChromeViewHostMsg_SearchBoxPaste to the browser.
   void Paste(const string16& text);
 
   const ThemeBackgroundInfo& GetThemeBackgroundInfo();
@@ skipping 65 matching lines @@
   size_t omnibox_font_size_;
   string16 query_;
   int start_margin_;
   InstantSuggestion suggestion_;
   int width_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBox);
 };
 
 #endif  // CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_