Flip the default for the cookie prompt to disabled.

chrome/browser/cocoa/content_settings_dialog_controller.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/cocoa/content_settings_dialog_controller.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "app/l10n_util.h"
 #include "base/command_line.h"
@@ skipping 107 matching lines @@
   // TODO(thakis): Autosave window pos.
 
   [g_instance selectTab:settingsType];
   [g_instance showWindow:nil];
   [g_instance closeExceptionsSheet];
   return g_instance;
 }
 
 - (id)initWithProfile:(Profile*)profile {
   DCHECK(profile);
-  disableCookiePrompt_ = CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableCookiePrompt);
+  disableCookiePrompt_ = !CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableCookiePrompt);
   NSString* nibpath =
       [mac_util::MainAppBundle() pathForResource:@"ContentSettings"
                                           ofType:@"nib"];
   if ((self = [super initWithWindowNibPath:nibpath owner:self])) {
     profile_ = profile;
 
     observer_.reset(
         new ContentSettingsDialogControllerInternal::PrefObserverBridge(self));
     clearSiteDataOnExit_.Init(prefs::kClearSiteDataOnExit,
                               profile_->GetPrefs(), observer_.get());
@@ skipping 394 matching lines @@
     [self willChangeValueForKey:@"geolocationSettingIndex"];
     [self didChangeValueForKey:@"geolocationSettingIndex"];
   }
   if (*prefName == prefs::kDesktopNotificationDefaultContentSetting) {
     [self willChangeValueForKey:@"notificationsSettingIndex"];
     [self didChangeValueForKey:@"notificationsSettingIndex"];
   }
 }
 
 @end