Remove obsolete chromeos specific code

ui/base/gtk/tooltip_window_gtk.cc

Index: ui/base/gtk/tooltip_window_gtk.cc
diff --git a/ui/base/gtk/tooltip_window_gtk.cc b/ui/base/gtk/tooltip_window_gtk.cc
deleted file mode 100644
index 2ef65ee715279b0fe10e43ea42d91f758f5650ad..0000000000000000000000000000000000000000
--- a/ui/base/gtk/tooltip_window_gtk.cc
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright (c) 2011 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 "ui/base/gtk/tooltip_window_gtk.h"
-
-#include <gtk/gtk.h>
-
-#include "base/utf_string_conversions.h"
-
-namespace ui {
-
-TooltipWindowGtk::TooltipWindowGtk(GtkWidget* widget)
-    : host_(widget),
-      window_(NULL),
-      alignment_(NULL),
-      label_(NULL) {
-  Init();
-}
-
-TooltipWindowGtk::~TooltipWindowGtk() {
-  if (window_)
-    gtk_widget_destroy(window_);
-}
-
-void TooltipWindowGtk::SetTooltipText(const string16& text) {
-  gtk_label_set_text(label(), UTF16ToUTF8(text).c_str());
-}
-
-GtkLabel* TooltipWindowGtk::label() {
-  return GTK_LABEL(label_);
-}
-
-void  TooltipWindowGtk::Init() {
-  // Creates and setup tooltip window.
-  window_ = gtk_window_new(GTK_WINDOW_POPUP);
-  gtk_window_set_type_hint(GTK_WINDOW(window_), GDK_WINDOW_TYPE_HINT_TOOLTIP);
-  gtk_widget_set_app_paintable(window_, TRUE);
-  gtk_window_set_resizable(GTK_WINDOW(window_), FALSE);
-  gtk_widget_set_name(window_, "gtk-tooltip");
-
-  GdkColormap* rgba_colormap =
-      gdk_screen_get_rgba_colormap(gdk_screen_get_default());
-  if (rgba_colormap)
-    gtk_widget_set_colormap(window_, rgba_colormap);
-
-  g_signal_connect(G_OBJECT(window_), "expose-event",
-                   G_CALLBACK(&OnPaintThunk), this);
-  g_signal_connect(G_OBJECT(window_), "style-set",
-                   G_CALLBACK(&OnStyleSetThunk), this);
-
-  alignment_ = gtk_alignment_new(0.5, 0.5, 1.0, 1.0);
-  gtk_container_add(GTK_CONTAINER(window_), alignment_);
-  gtk_widget_show(alignment_);
-
-  label_ = gtk_label_new("");
-  gtk_label_set_line_wrap(GTK_LABEL(label_), TRUE);
-  gtk_container_add(GTK_CONTAINER(alignment_), label_);
-  gtk_widget_show(label_);
-
-  // Associates the tooltip window with given widget
-  gtk_widget_set_tooltip_window(host_, GTK_WINDOW(window_));
-}
-
-// Paints our customized tooltip window.
-gboolean TooltipWindowGtk::OnPaint(GtkWidget* widget, GdkEventExpose* event) {
-  GtkAllocation allocation;
-  gtk_widget_get_allocation(widget, &allocation);
-  gtk_paint_flat_box(gtk_widget_get_style(widget),
-      gtk_widget_get_window(widget),
-      GTK_STATE_NORMAL,
-      GTK_SHADOW_OUT,
-      NULL,
-      widget,
-      "tooltip",
-      0, 0,
-      allocation.width,
-      allocation.height);
-
-  return FALSE;
-}
-
-// Style change handler.
-void TooltipWindowGtk::OnStyleSet(GtkWidget* widget,
-                                  GtkStyle* previous_style) {
-  GtkStyle* style = gtk_widget_get_style(widget);
-  gtk_alignment_set_padding(GTK_ALIGNMENT(alignment_),
-      style->ythickness,
-      style->ythickness,
-      style->xthickness,
-      style->xthickness);
-
-  gtk_widget_queue_draw(widget);
-}
-
-}  // namespace ui