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

chrome/browser/ui/gtk/avatar_menu_bubble_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/avatar_menu_bubble_gtk.h"
 
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 166 matching lines @@
   GdkPixbuf* limited_user_pixbuf =
       avatar_menu_->GetManagedUserIcon().ToGdkPixbuf();
   GtkWidget* limited_user_img = gtk_image_new_from_pixbuf(limited_user_pixbuf);
   GtkWidget* icon_align = gtk_alignment_new(0, 0, 0, 0);
   gtk_container_add(GTK_CONTAINER(icon_align), limited_user_img);
   gtk_box_pack_start(GTK_BOX(managed_user_info), icon_align, FALSE, FALSE, 0);
   GtkWidget* status_label =
       theme_service_->BuildLabel(std::string(), ui::kGdkBlack);
   char* markup = g_markup_printf_escaped(
       "<span size='small'>%s</span>",
-      UTF16ToUTF8(avatar_menu_->GetManagedUserInformation()).c_str());
+      base::UTF16ToUTF8(avatar_menu_->GetManagedUserInformation()).c_str());
   const int kLabelWidth = 150;
   gtk_widget_set_size_request(status_label, kLabelWidth, -1);
   gtk_label_set_markup(GTK_LABEL(status_label), markup);
   gtk_label_set_line_wrap(GTK_LABEL(status_label), TRUE);
   gtk_misc_set_alignment(GTK_MISC(status_label), 0, 0);
   g_free(markup);
   gtk_box_pack_start(GTK_BOX(managed_user_info), status_label, FALSE, FALSE, 0);
   gtk_box_pack_start(
       GTK_BOX(inner_contents_), managed_user_info, FALSE, FALSE, 0);
 
@@ skipping 32 matching lines @@
   if (bubble_)
     gtk_widget_show_all(contents_);
 }
 
 void AvatarMenuBubbleGtk::CloseBubble() {
   if (bubble_) {
     bubble_->Close();
     bubble_ = NULL;
   }
 }