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

chrome/browser/ui/gtk/browser_actions_toolbar_gtk.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 "chrome/browser/ui/gtk/browser_actions_toolbar_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 1049 matching lines @@
       gtk_chrome_shrinkable_hbox_get_visible_child_count(
           GTK_CHROME_SHRINKABLE_HBOX(button_hbox_.get()));
   for (int i = visible_icon_count; i < button_count(); ++i) {
     int model_index = i;
     if (profile_->IsOffTheRecord())
       model_index = model_->IncognitoIndexToOriginal(i);
 
     const Extension* extension = model_->toolbar_items()[model_index].get();
     BrowserActionButton* button = extension_button_map_[extension->id()].get();
 
-    overflow_menu_model_->AddItem(model_index, UTF8ToUTF16(extension->name()));
+    overflow_menu_model_->AddItem(model_index,
+                                  base::UTF8ToUTF16(extension->name()));
     overflow_menu_model_->SetIcon(overflow_menu_model_->GetItemCount() - 1,
                                   button->GetIcon());
 
     // TODO(estade): set the menu item's tooltip.
   }
 
   overflow_menu_.reset(new MenuGtk(this, overflow_menu_model_.get()));
   signals_.Connect(overflow_menu_->widget(), "button-press-event",
                    G_CALLBACK(OnOverflowMenuButtonPressThunk), this);
 
@@ skipping 36 matching lines @@
 
   menu->PopupAsContext(gfx::Point(event->x_root, event->y_root),
                        event->time);
   return TRUE;
 }
 
 void BrowserActionsToolbarGtk::OnButtonShowOrHide(GtkWidget* sender) {
   if (!resize_animation_.is_animating())
     UpdateChevronVisibility();
 }