Small cleanup for ChromeBrowserMain:

chrome/browser/chrome_browser_main_x11.h

Index: chrome/browser/chrome_browser_main_x11.h
===================================================================
--- chrome/browser/chrome_browser_main_x11.h	(revision 210624)
+++ chrome/browser/chrome_browser_main_x11.h	(working copy)
@@ -1,24 +0,0 @@
-// 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.
-
-// Contains functions used by BrowserMain() that are gtk-specific.
-
-#ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_X11_H_
-#define CHROME_BROWSER_CHROME_BROWSER_MAIN_X11_H_
-
-// Installs the X11 error handlers for the browser process used during
-// startup. They simply print error messages and exit because
-// we can't shutdown properly while creating and initializing services.
-void SetBrowserX11ErrorHandlersPreEarlyInitialization();
-
-// Installs the X11 error handlers for the browser process after the
-// main message loop has started. This will allow us to exit cleanly
-// if X exits before us.
-void SetBrowserX11ErrorHandlersPostMainMessageLoopStart();
-
-// Installs empty X11 error handlers. This avoids calling into the message-loop
-// in case an X11 erro happens while the message-loop is being destroyed.
-void UnsetBrowserX11ErrorHandlers();
-
-#endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_X11_H_