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

chrome/browser/ui/gtk/apps/native_app_window_gtk.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/gtk/apps/native_app_window_gtk.h"
 
 #include <gdk/gdkx.h>
 #include <vector>
 
 #include "base/message_loop/message_pump_gtk.h"
@@ skipping 616 matching lines @@
   Profile* profile = shell_window_->profile();
   gfx::Image app_icon = shell_window_->app_icon();
   if (!app_icon.IsEmpty())
     gtk_util::SetWindowIcon(window_, profile, app_icon.ToGdkPixbuf());
   else
     gtk_util::SetWindowIcon(window_, profile);
 }
 
 void NativeAppWindowGtk::UpdateWindowTitle() {
   base::string16 title = shell_window_->GetTitle();
-  gtk_window_set_title(window_, UTF16ToUTF8(title).c_str());
+  gtk_window_set_title(window_, base::UTF16ToUTF8(title).c_str());
 }
 
 void NativeAppWindowGtk::UpdateDraggableRegions(
     const std::vector<extensions::DraggableRegion>& regions) {
   // Draggable region is not supported for non-frameless window.
   if (!frameless_)
     return;
 
   draggable_region_.reset(ShellWindow::RawDraggableRegionsToSkRegion(regions));
 }
@@ skipping 63 matching lines @@
     hints_mask |= GDK_HINT_MAX_SIZE;
   }
   if (hints_mask) {
     gtk_window_set_geometry_hints(
         window_,
         GTK_WIDGET(window_),
         &hints,
         static_cast<GdkWindowHints>(hints_mask));
   }
 }