Add unittests for X11TopmostWindowFinder

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_
 
 // This file declares utility functions for X11 (Linux only).
 //
 // These functions do not require the Xlib headers to be included (which is why
@@ skipping 154 matching lines @@
 
 // These setters all make round trips.
 UI_BASE_EXPORT bool SetIntProperty(XID window,
                                    const std::string& name,
                                    const std::string& type,
                                    int value);
 UI_BASE_EXPORT bool SetIntArrayProperty(XID window,
                                         const std::string& name,
                                         const std::string& type,
                                         const std::vector<int>& value);
+UI_BASE_EXPORT bool SetAtomProperty(XID window,
+                                    const std::string& name,
+                                    const std::string& type,
+                                    Atom value);
 UI_BASE_EXPORT bool SetAtomArrayProperty(XID window,
                                          const std::string& name,
                                          const std::string& type,
                                          const std::vector<Atom>& value);
 UI_BASE_EXPORT bool SetStringProperty(XID window,
                                       Atom property,
                                       Atom type,
                                       const std::string& value);
 
 // Gets the X atom for default display corresponding to atom_name.
@@ skipping 165 matching lines @@
 UI_BASE_EXPORT void ResetXCursorCache();
 
 // Returns the cached XcursorImage for |cursor|.
 UI_BASE_EXPORT const XcursorImage* GetCachedXcursorImage(::Cursor cursor);
 
 }  // namespace test
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_H_