Add base:: namespace to straggling string16s left in chrome/browser/ui.

chrome/browser/ui/search/instant_search_prerenderer.h

Index: chrome/browser/ui/search/instant_search_prerenderer.h
diff --git a/chrome/browser/ui/search/instant_search_prerenderer.h b/chrome/browser/ui/search/instant_search_prerenderer.h
index 7d55b46916586099a8edb8ca5ea0940d2ac0f779..ab977bf6589c030a4a828e7311581716dd274403 100644
--- a/chrome/browser/ui/search/instant_search_prerenderer.h
+++ b/chrome/browser/ui/search/instant_search_prerenderer.h
@@ -60,19 +60,19 @@ class InstantSearchPrerenderer {
   void Prerender(const InstantSuggestion& suggestion);
 
   // Tells the Instant search base page to render the prefetched search results.
-  void Commit(const string16& query);
+  void Commit(const base::string16& query);
 
   // Returns true if the prerendered page can be used to process the search for
   // the given |source|.
   bool CanCommitQuery(content::WebContents* source,
-                      const string16& query) const;
+                      const base::string16& query) const;
 
   // Returns true and updates |params->target_contents| if a prerendered page
   // exists for |url| and is swapped in.
   bool UsePrerenderedPage(const GURL& url, chrome::NavigateParams* params);
 
   // Returns the last prefetched search query.
-  const string16& get_last_query() const {
+  const base::string16& get_last_query() const {
     return last_instant_suggestion_.text;
   }