InstantExtended: add back focus() API call.

chrome/renderer/resources/extensions/searchbox_api.js

Index: chrome/renderer/resources/extensions/searchbox_api.js
diff --git a/chrome/renderer/resources/extensions/searchbox_api.js b/chrome/renderer/resources/extensions/searchbox_api.js
index ef5a8ddb9269276c50fa42dd9a707bff6acb0662..48a91883c18d910533856054146d780e48a02663 100644
--- a/chrome/renderer/resources/extensions/searchbox_api.js
+++ b/chrome/renderer/resources/extensions/searchbox_api.js
@@ -13,6 +13,7 @@ if (!chrome.embeddedSearch) {
       // =======================================================================
       //                            Private functions
       // =======================================================================
+      native function Focus();
       native function GetDisplayInstantResults();
       native function GetFont();
       native function GetFontSize();
@@ -41,6 +42,10 @@ if (!chrome.embeddedSearch) {
       this.__defineGetter__('suggestion', GetSuggestionToPrefetch);
       this.__defineGetter__('value', GetQuery);
 
+      this.focus = function() {
+        Focus();
+      };
+
       // This method is restricted to chrome-search://most-visited pages by
       // checking the invoking context's origin in searchbox_extension.cc.
       this.getMostVisitedItemData = function(restrictedId) {