Have panels respond to changes in work area on Linux.

ui/base/x/x11_util.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_X_X11_UTIL_H_
 #define UI_BASE_X_X11_UTIL_H_
 #pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
@@ skipping 105 matching lines @@
 UI_EXPORT bool GetIntProperty(XID window, const std::string& property_name,
                               int* value);
 UI_EXPORT bool GetIntArrayProperty(XID window, const std::string& property_name,
                                    std::vector<int>* value);
 UI_EXPORT bool GetAtomArrayProperty(XID window,
                                     const std::string& property_name,
                                     std::vector<Atom>* value);
 UI_EXPORT bool GetStringProperty(
     XID window, const std::string& property_name, std::string* value);
 
+// Gets the X atom for default display corresponding to atom_name.
+Atom GetAtom(const char* atom_name);
+
 // Get |window|'s parent window, or None if |window| is the root window.
 XID GetParentWindow(XID window);
 
 // Walk up |window|'s hierarchy until we find a direct child of |root|.
 XID GetHighestAncestorWindow(XID window, XID root);
 
 static const int kAllDesktops = -1;
 // Queries the desktop |window| is on, kAllDesktops if sticky. Returns false if
 // property not found.
 bool GetWindowDesktop(XID window, int* desktop);
@@ skipping 70 matching lines @@
 // the process if called. Use SetX11ErrorHandlers() from x11_util_internal.h
 // to set your own error handlers.
 UI_EXPORT void SetDefaultX11ErrorHandlers();
 
 // Return true if a given window is in full-screen mode.
 UI_EXPORT bool IsX11WindowFullScreen(XID window);
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_H_