Better fix for Lion dictionary popover cmd-W bug.

chrome/browser/chrome_browser_main_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.
 
 #include "chrome/browser/chrome_browser_main_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 84 matching lines @@
 
   // Now load the nib (from the right bundle).
   scoped_nsobject<NSNib>
       nib([[NSNib alloc] initWithNibNamed:@"MainMenu"
                                    bundle:base::mac::MainAppBundle()]);
   // TODO(viettrungluu): crbug.com/20504 - This currently leaks, so if you
   // change this, you'll probably need to change the Valgrind suppression.
   [nib instantiateNibWithOwner:NSApp topLevelObjects:nil];
   // Make sure the app controller has been created.
   DCHECK([NSApp delegate]);
-  DCHECK([[NSApp delegate] isKindOfClass:[AppController class]]);
-  [[NSApp delegate] registerEventHandlersAndInitialize];
 
   // This is a no-op if the KeystoneRegistration framework is not present.
   // The framework is only distributed with branded Google Chrome builds.
   [[KeystoneGlue defaultKeystoneGlue] registerWithKeystone];
 
   // Prevent Cocoa from turning command-line arguments into
   // |-application:openFiles:|, since we already handle them directly.
   [[NSUserDefaults standardUserDefaults]
       setObject:@"NO" forKey:@"NSTreatUnknownArgumentsAsOpen"];
 }
 
 void ChromeBrowserMainPartsMac::ShowMissingLocaleMessageBox() {
   // Not called on Mac because we load the locale files differently.
   NOTREACHED();
 }
 
 void ChromeBrowserMainPartsMac::DidEndMainMessageLoop() {
   AppController* appController = [NSApp delegate];
   [appController didEndMainMessageLoop];
 }