Allow overriding of X error functions

app/x11_util.h

 // Copyright (c) 2010 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 APP_X11_UTIL_H_
 #define APP_X11_UTIL_H_
 #pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
@@ skipping 155 matching lines @@
 bool GetWindowManagerName(std::string* name);
 
 // Grabs a snapshot of the designated window and stores a PNG representation
 // into a byte vector.
 void GrabWindowSnapshot(GtkWindow* gdk_window,
                         std::vector<unsigned char>* png_representation);
 
 // Change desktop for |window| to the desktop of |destination| window.
 bool ChangeWindowDesktop(XID window, XID destination);
 
-// Sets the X Error Handlers so we can catch X errors and crash.
-void SetX11ErrorHandlers();
+// Enable the default X error handlers. These will log the error and abort
+// the process if called. Use SetX11ErrorHandlers() from x11_util_internal.h
+// to set your own error handlers.
+void SetDefaultX11ErrorHandlers();
 
 }  // namespace x11_util
 
 #endif  // APP_X11_UTIL_H_