InstantExtended: add back focus() API call.

chrome/renderer/searchbox/searchbox.cc

 // 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.
 
 #include "chrome/renderer/searchbox/searchbox.h"
 
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 205 matching lines @@
     InstantRestrictedID most_visited_item_id,
     InstantMostVisitedItem* item) const {
   return most_visited_items_cache_.GetItemWithRestrictedID(most_visited_item_id,
                                                            item);
 }
 
 const ThemeBackgroundInfo& SearchBox::GetThemeBackgroundInfo() {
   return theme_info_;
 }
 
+void SearchBox::Focus() {
+  render_view()->Send(new ChromeViewHostMsg_FocusOmnibox(
+      render_view()->GetRoutingID(), render_view()->GetPageId(),
+      OMNIBOX_FOCUS_VISIBLE));
+}
+
 void SearchBox::NavigateToURL(const GURL& url,
                               content::PageTransition transition,
                               WindowOpenDisposition disposition,
                               bool is_search_type) {
   render_view()->Send(new ChromeViewHostMsg_SearchBoxNavigate(
       render_view()->GetRoutingID(), render_view()->GetPageId(),
       url, transition, disposition, is_search_type));
 }
 
 void SearchBox::Paste(const string16& text) {
@@ skipping 204 matching lines @@
 
 void SearchBox::Reset() {
   query_.clear();
   suggestion_ = InstantSuggestion();
   start_margin_ = 0;
   width_ = 0;
   is_focused_ = false;
   is_key_capture_enabled_ = false;
   theme_info_ = ThemeBackgroundInfo();
 }