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

chrome/browser/ui/search/instant_search_prerenderer.cc

 // Copyright 2013 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/browser/ui/search/instant_search_prerenderer.h"
 
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/prerender/prerender_handle.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
@@ skipping 82 matching lines @@
     return;
 
   if (!prerender_contents())
     return;
 
   last_instant_suggestion_ = suggestion;
   SearchTabHelper::FromWebContents(prerender_contents())->
       SetSuggestionToPrefetch(suggestion);
 }
 
-void InstantSearchPrerenderer::Commit(const string16& query) {
+void InstantSearchPrerenderer::Commit(const base::string16& query) {
   DCHECK(prerender_handle_);
   DCHECK(prerender_contents());
   SearchTabHelper::FromWebContents(prerender_contents())->Submit(query);
 }
 
-bool InstantSearchPrerenderer::CanCommitQuery(content::WebContents* source,
-                                              const string16& query) const {
+bool InstantSearchPrerenderer::CanCommitQuery(
+    content::WebContents* source,
+    const base::string16& query) const {
   if (!source || query.empty())
     return false;
 
   if (last_instant_suggestion_.text != query)
     return false;
 
   if (!prerender_handle_ || !prerender_contents())
     return false;
 
   // InstantSearchPrerenderer can commit query to the prerendered page only if
   // the underlying |source| page doesn't support Instant search.
   return !PageSupportsInstantSearch(source);
 }
 
 bool InstantSearchPrerenderer::UsePrerenderedPage(
     const GURL& url,
     chrome::NavigateParams* params) {
-  string16 search_terms = chrome::GetSearchTermsFromURL(profile_, url);
+  base::string16 search_terms = chrome::GetSearchTermsFromURL(profile_, url);
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForProfile(profile_);
   if (search_terms.empty() ||
       !params->target_contents ||
       last_instant_suggestion_.text != search_terms ||
       !prerender_contents() ||
       !prerender_manager) {
     Cancel();
     return false;
   }
 
   bool success = prerender_manager->MaybeUsePrerenderedPage(
       prerender_contents()->GetURL(), params);
   prerender_handle_.reset();
   return success;
 }
 
 bool InstantSearchPrerenderer::IsAllowed(const AutocompleteMatch& match,
                                          content::WebContents* source) const {
   return source && AutocompleteMatch::IsSearchType(match.type) &&
       !PageSupportsInstantSearch(source);
 }
 
 content::WebContents* InstantSearchPrerenderer::prerender_contents() const {
   return (prerender_handle_ && prerender_handle_->contents()) ?
       prerender_handle_->contents()->prerender_contents() : NULL;
 }