Remove Tabpose feature on mac, and supporting infrastructure (PaintAtSize)

chrome/browser/app_controller_mac.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 CHROME_BROWSER_APP_CONTROLLER_MAC_H_
 #define CHROME_BROWSER_APP_CONTROLLER_MAC_H_
 
 #if defined(__OBJC__)
 
 #import <Cocoa/Cocoa.h>
@@ skipping 57 matching lines @@
   // commmand-key equivalent depending on the kind of window and how many
   // tabs it has.
   IBOutlet NSMenuItem* closeTabMenuItem_;
   IBOutlet NSMenuItem* closeWindowMenuItem_;
   BOOL fileMenuUpdatePending_;  // ensure we only do this once per notificaion.
 
   // Outlet for the help menu so we can bless it so Cocoa adds the search item
   // to it.
   IBOutlet NSMenu* helpMenu_;
 
-  // Outlet for the tabpose menu item so we can hide it.
-  IBOutlet NSMenuItem* tabposeMenuItem_;
-
   // Indicates wheter an NSPopover is currently being shown.
   BOOL hasPopover_;
 
   // If we are expecting a workspace change in response to a reopen
   // event, the time we got the event. A null time otherwise.
   base::TimeTicks reopenTime_;
 
   // Observers that listen to the work area changes.
   ObserverList<ui::WorkAreaWatcherObserver> workAreaChangeObservers_;
 
@@ skipping 58 matching lines @@
 namespace app_controller_mac {
 
 // True if we are currently handling an IDC_NEW_{TAB,WINDOW} command. Used in
 // SessionService::Observe() to get around windows/linux and mac having
 // different models of application lifetime.
 bool IsOpeningNewWindow();
 
 }  // namespace app_controller_mac
 
 #endif