Remove obsolete chromeos specific code

chrome/browser/ui/cocoa/browser_window_cocoa.mm

 // 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/cocoa/browser_window_cocoa.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 345 matching lines @@
 }
 
 void BrowserWindowCocoa::RotatePaneFocus(bool forwards) {
   // Not needed on the Mac.
 }
 
 void BrowserWindowCocoa::FocusBookmarksToolbar() {
   // Not needed on the Mac.
 }
 
-void BrowserWindowCocoa::FocusChromeOSStatus() {
-  // Not needed on the Mac.
-}
 
 bool BrowserWindowCocoa::IsBookmarkBarVisible() const {
   return browser_->profile()->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar);
 }
 
 bool BrowserWindowCocoa::IsBookmarkBarAnimating() const {
   return [controller_ isBookmarkBarAnimating];
 }
 
 bool BrowserWindowCocoa::IsTabStripEditable() const {
@@ skipping 284 matching lines @@
   AvatarMenuBubbleController* menu =
       [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
                                                anchoredAt:point];
   [[menu bubble] setAlignment:info_bubble::kAlignEdgeToAnchorEdge];
   [menu showWindow:nil];
 }
 
 void BrowserWindowCocoa::ShowAvatarBubbleFromAvatarButton() {
   [[controller_ avatarButtonController] showAvatarBubble];
 }