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

chrome/browser/app_controller_mac.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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "apps/app_shim/app_shim_mac.h"
 #include "apps/app_shim/extension_app_shim_handler_mac.h"
 #include "apps/shell_window_registry.h"
 #include "base/auto_reset.h"
@@ skipping 723 matching lines @@
   startupComplete_ = YES;
 
   // TODO(viettrungluu): This is very temporary, since this should be done "in"
   // |BrowserMain()|, i.e., this list of startup URLs should be appended to the
   // (probably-empty) list of URLs from the command line.
   if (startupUrls_.size()) {
     [self openUrls:startupUrls_];
     [self clearStartupUrls];
   }
 
-  const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
-  if (!parsed_command_line.HasSwitch(switches::kEnableExposeForTabs)) {
-    [tabposeMenuItem_ setHidden:YES];
-  }
-
   PrefService* localState = g_browser_process->local_state();
   if (localState) {
     localPrefRegistrar_.Init(localState);
     localPrefRegistrar_.Add(
         prefs::kAllowFileSelectionDialogs,
         base::Bind(&chrome::BrowserCommandController::UpdateOpenFileState,
                    menuState_.get()));
   }
 }
 
@@ skipping 762 matching lines @@
 
 //---------------------------------------------------------------------------
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac