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

chrome/browser/ui/browser_focus_uitest.cc

 // Copyright (c) 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 "base/bind.h"
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 321 matching lines @@
   ASSERT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
 
   // First we navigate to our test page.
   GURL url = embedded_test_server()->GetURL(kSimplePage);
   ui_test_utils::NavigateToURL(browser(), url);
 
   chrome::Find(browser());
   ui_test_utils::FindInPage(
       browser()->tab_strip_model()->GetActiveWebContents(),
-      ASCIIToUTF16("a"), true, false, NULL, NULL);
+      base::ASCIIToUTF16("a"), true, false, NULL, NULL);
   ASSERT_TRUE(IsViewFocused(VIEW_ID_FIND_IN_PAGE_TEXT_FIELD));
 
   // Focus the location bar.
   chrome::FocusLocationBar(browser());
 
   // Create a 2nd tab.
   chrome::AddSelectedTabWithURL(browser(), url, content::PAGE_TRANSITION_TYPED);
 
   // Focus should be on the recently opened tab page.
   ASSERT_TRUE(IsViewFocused(VIEW_ID_TAB_CONTAINER));
@@ skipping 627 matching lines @@
         content::NOTIFICATION_NAV_ENTRY_COMMITTED,
         content::NotificationService::AllSources());
     chrome::GoForward(browser(), CURRENT_TAB);
     forward_nav_observer.Wait();
   }
 
   EXPECT_FALSE(IsViewFocused(VIEW_ID_OMNIBOX));
 }
 
 }  // namespace