content: Split web_drag_dest_gtk.cc into chrome/ and content/ parts.

ui/base/gtk/gtk_screen_utils.cc

+// 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/gtk_screen_utils.h"
+
+namespace ui {
+
+bool IsScreenComposited() {
+  GdkScreen* screen = gdk_screen_get_default();
+  return gdk_screen_is_composited(screen) == TRUE;
+}
+
+gfx::Point ScreenPoint(GtkWidget* widget) {
+  int x, y;
+  gdk_display_get_pointer(gtk_widget_get_display(widget), NULL, &x, &y,
+                          NULL);
+  return gfx::Point(x, y);
+}
+
+gfx::Point ClientPoint(GtkWidget* widget) {
+  int x, y;
+  gtk_widget_get_pointer(widget, &x, &y);
+  return gfx::Point(x, y);
+}
+
+}  // namespace ui