Mac: Add "Show Tab Overview" menu item.

chrome/browser/app_controller_mac.mm

 // Copyright (c) 2010 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 "app/l10n_util_mac.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/mac_util.h"
@@ skipping 197 matching lines @@
   // Activate (bring to foreground) if asked to do so.  On
   // Windows this logic isn't necessary since
   // BrowserWindow::Activate() calls ::SetForegroundWindow() which is
   // adequate.  On Mac, BrowserWindow::Activate() calls -[NSWindow
   // makeKeyAndOrderFront:] which does not activate the application
   // itself.
   const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
   if (parsed_command_line.HasSwitch(switches::kActivateOnLaunch)) {
     [NSApp activateIgnoringOtherApps:YES];
   }
+
+  if (!parsed_command_line.HasSwitch(switches::kEnableExposeForTabs)) {
+    [tabposeMenuItem_ setHidden:YES];
+  }
 }
 
 // (NSApplicationDelegate protocol) This is the Apple-approved place to override
 // the default handlers.
 - (void)applicationWillFinishLaunching:(NSNotification*)notification {
   // Nothing here right now.
 }
 
 - (BOOL)tryToTerminateApplication:(NSApplication*)app {
   // Check for in-process downloads, and prompt the user if they really want
@@ skipping 832 matching lines @@
   [appController showPreferencesWindow:nil page:page profile:profile];
 }
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac