Move TooltipWindowGtk from views/widget to ui/base/gtk.

ui/base/gtk/tooltip_window_gtk.cc

 // Copyright (c) 2010 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 "views/widget/tooltip_window_gtk.h"
+#include "ui/base/gtk/tooltip_window_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/utf_string_conversions.h"
 
-namespace views {
+namespace ui {
 
 TooltipWindowGtk::TooltipWindowGtk(GtkWidget* widget)
     : host_(widget),
       window_(NULL),
       alignment_(NULL),
       label_(NULL) {
   Init();
 }
 
 TooltipWindowGtk::~TooltipWindowGtk() {
@@ skipping 63 matching lines @@
                                   GtkStyle* previous_style) {
   gtk_alignment_set_padding(GTK_ALIGNMENT(alignment_),
       widget->style->ythickness,
       widget->style->ythickness,
       widget->style->xthickness,
       widget->style->xthickness);
 
   gtk_widget_queue_draw(widget);
 }
 
-}  // namespace views
+}  // namespace ui