mac: Crash on uncaught Objective-C exceptions routed to NSApplication

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/files/file_path.h"
@@ skipping 134 matching lines @@
 
   // Now load the nib (from the right bundle).
   base::scoped_nsobject<NSNib> nib(
       [[NSNib alloc] initWithNibNamed:@"MainMenu"
                                bundle:base::mac::FrameworkBundle()]);
   // 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]);
-
-  [[NSUserDefaults standardUserDefaults] registerDefaults:@{
-      // Prevent Cocoa from turning command-line arguments into
-      // |-application:openFiles:|, since we already handle them directly.
-      // @"NO" looks like a mistake, but the value really is supposed to be a
-      // string.
-      @"NSTreatUnknownArgumentsAsOpen": @"NO"
-  }];
 }
 
 void ChromeBrowserMainPartsMac::PostMainMessageLoopStart() {
   MacStartupProfiler::GetInstance()->Profile(
       MacStartupProfiler::POST_MAIN_MESSAGE_LOOP_START);
   ChromeBrowserMainPartsPosix::PostMainMessageLoopStart();
 }
 
 void ChromeBrowserMainPartsMac::PreProfileInit() {
   MacStartupProfiler::GetInstance()->Profile(
@@ skipping 29 matching lines @@
     [glue updateProfileCountsWithNumProfiles:0
                          numSignedInProfiles:0];
   }
 }
 
 void ChromeBrowserMainPartsMac::DidEndMainMessageLoop() {
   AppController* appController =
       base::mac::ObjCCastStrict<AppController>([NSApp delegate]);
   [appController didEndMainMessageLoop];
 }