Remove obsolete chromeos specific code

chrome/browser/ui/gtk/browser_window_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 
 #include <dlfcn.h>
 #include <gdk/gdkkeysyms.h>
 
 #include <algorithm>
@@ skipping 968 matching lines @@
 }
 
 void BrowserWindowGtk::FocusAppMenu() {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowGtk::FocusBookmarksToolbar() {
   NOTIMPLEMENTED();
 }
 
-void BrowserWindowGtk::FocusChromeOSStatus() {
-  NOTIMPLEMENTED();
-}
-
 void BrowserWindowGtk::RotatePaneFocus(bool forwards) {
   NOTIMPLEMENTED();
 }
 
 bool BrowserWindowGtk::IsBookmarkBarVisible() const {
   return browser_->SupportsWindowFeature(Browser::FEATURE_BOOKMARKBAR) &&
          bookmark_bar_.get() &&
          browser_->profile()->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar);
 }
 
@@ skipping 1590 matching lines @@
           wm_type == ui::WM_OPENBOX ||
           wm_type == ui::WM_XFWM4);
 }
 
 // static
 BrowserWindow* BrowserWindow::CreateBrowserWindow(Browser* browser) {
   BrowserWindowGtk* browser_window_gtk = new BrowserWindowGtk(browser);
   browser_window_gtk->Init();
   return browser_window_gtk;
 }