Users stuck in fullscreen mode when running gnome-shell.

ui/base/x/x11_util.h

 // Copyright (c) 2012 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_X_X11_UTIL_H_
 #define UI_BASE_X_X11_UTIL_H_
 #pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
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 // Get the GtkWindow* wrapping a given XID, if any.
 // Returns NULL if there isn't already a GtkWindow* wrapping this XID;
 // see gdk_window_foreign_new() etc. to wrap arbitrary XIDs.
 UI_EXPORT GtkWindow* GetGtkWindowFromX11Window(XID xid);
 
 // Get a Visual from the given widget. Since we don't include the Xlib
 // headers, this is returned as a void*.
 UI_EXPORT void* GetVisualFromGtkWidget(GtkWidget* widget);
 #endif  // defined(TOOLKIT_GTK)
 
+// Sets _GTK_HIDE_TITLEBAR_WHEN_MAXIMIZED on |window|.
+UI_EXPORT void SetHideTitlebarWhenMaximizedProperty(XID window);
+
 // Return the number of bits-per-pixel for a pixmap of the given depth
 UI_EXPORT int BitsPerPixelForPixmapDepth(Display* display, int depth);
 
 // Returns true if |window| is visible.
 UI_EXPORT bool IsWindowVisible(XID window);
 
 // Returns the bounds of |window|.
 UI_EXPORT bool GetWindowRect(XID window, gfx::Rect* rect);
 
 // Return true if |window| has any property with |property_name|.
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  private:
   char* string_;
 
   DISALLOW_COPY_AND_ASSIGN(XScopedString);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_H_