Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/app_list/search/search_controller.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/app_list/search/search_controller.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 110 matching lines @@
   content::RecordAction(content::UserMetricsAction("AppList_Search"));
 
   ChromeSearchResult* chrome_result =
       static_cast<app_list::ChromeSearchResult*>(result);
   UMA_HISTOGRAM_ENUMERATION(kAppListSearchResultOpenTypeHistogram,
                             chrome_result->GetType(),
                             SEARCH_RESULT_TYPE_BOUNDARY);
   chrome_result->Open(event_flags);
 
   if (history_ && history_->IsReady()) {
-    history_->AddLaunchEvent(UTF16ToUTF8(search_box_->text()),
+    history_->AddLaunchEvent(base::UTF16ToUTF8(search_box_->text()),
                              chrome_result->id());
   }
 }
 
 void SearchController::InvokeResultAction(SearchResult* result,
                                           int action_index,
                                           int event_flags) {
   // TODO(xiyuan): Hook up with user learning.
   static_cast<app_list::ChromeSearchResult*>(result)->InvokeAction(
       action_index, event_flags);
 }
 
 void SearchController::AddProvider(Mixer::GroupId group,
                                    scoped_ptr<SearchProvider> provider) {
   provider->set_result_changed_callback(base::Bind(
       &SearchController::OnResultsChanged,
       base::Unretained(this)));
   mixer_->AddProviderToGroup(group, provider.get());
   providers_.push_back(provider.release());  // Takes ownership.
 }
 
 void SearchController::OnResultsChanged() {
   if (dispatching_query_)
     return;
 
   KnownResults known_results;
   if (history_ && history_->IsReady()) {
-    history_->GetKnownResults(UTF16ToUTF8(search_box_->text()))
+    history_->GetKnownResults(base::UTF16ToUTF8(search_box_->text()))
         ->swap(known_results);
   }
 
   mixer_->MixAndPublish(known_results);
 }
 
 }  // namespace app_list