Flip the default for the cookie prompt to disabled.

chrome/browser/cocoa/content_exceptions_window_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_exceptions_window_controller.h"
 
 #include "app/l10n_util.h"
 #include "app/l10n_util_mac.h"
 #include "app/table_model_observer.h"
 #include "base/command_line.h"
@@ skipping 160 matching lines @@
   NSString* nibpath =
       [mac_util::MainAppBundle() pathForResource:@"ContentExceptionsWindow"
                                           ofType:@"nib"];
   if ((self = [super initWithWindowNibPath:nibpath owner:self])) {
     settingsType_ = settingsType;
     settingsMap_ = settingsMap;
     otrSettingsMap_ = otrSettingsMap;
     model_.reset(new ContentExceptionsTableModel(
         settingsMap_, otrSettingsMap_, settingsType_));
     showSession_ = settingsType_ == CONTENT_SETTINGS_TYPE_COOKIES;
-    disableCookiePrompt_ = CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kDisableCookiePrompt);
+    disableCookiePrompt_ = !CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableCookiePrompt);
     otrAllowed_ = otrSettingsMap != NULL;
     tableObserver_.reset(new UpdatingContentSettingsObserver(self));
     updatesEnabled_ = YES;
 
     // TODO(thakis): autoremember window rect.
     // TODO(thakis): sorting support.
   }
   return self;
 }
 
@@ skipping 349 matching lines @@
 - (size_t)indexForSetting:(ContentSetting)setting {
   for (size_t i = 0; i < [self menuItemCount]; ++i) {
     if ([self settingForIndex:i] == setting)
       return i;
   }
   NOTREACHED();
   return 0;
 }
 
 @end