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

ui/base/gtk/gtk_screen_utils.h

+// 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.
+
+#ifndef UI_BASE_GTK_GTK_SCREEN_UTILS_H_
+#define UI_BASE_GTK_GTK_SCREEN_UTILS_H_
+
+#include <gtk/gtk.h>
+
+#include "ui/base/ui_export.h"
+#include "ui/gfx/point.h"
+
+namespace ui {
+
+// Returns true if the screen is composited, false otherwise.
+UI_EXPORT bool IsScreenComposited();
+
+// Get the current location of the mouse cursor relative to the screen.
+UI_EXPORT gfx::Point ScreenPoint(GtkWidget* widget);
+
+// Get the current location of the mouse cursor relative to the widget.
+UI_EXPORT gfx::Point ClientPoint(GtkWidget* widget);
+
+}  // namespace ui
+
+#endif  // UI_BASE_GTK_GTK_SCREEN_UTILS_H_