Remove the cookie prompt from the settings UI and migrate prefs from ask to block.

chrome/browser/host_content_settings_map.cc

 // 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.
 
 #include "chrome/browser/host_content_settings_map.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/pref_service.h"
@@ skipping 551 matching lines @@
                                                             &setting);
     DCHECK(found);
     for (size_t type = 0; type < arraysize(kTypeNames); ++type) {
       if ((kTypeNames[type] != NULL) &&
           (std::wstring(kTypeNames[type]) == content_type)) {
         settings->settings[type] = IntToContentSetting(setting);
         break;
       }
     }
   }
+  // Migrate obsolete cookie prompt mode.
+  if (settings->settings[CONTENT_SETTINGS_TYPE_COOKIES] == CONTENT_SETTING_ASK)
+    settings->settings[CONTENT_SETTINGS_TYPE_COOKIES] = CONTENT_SETTING_BLOCK;
 }
 
 void HostContentSettingsMap::ForceDefaultsToBeExplicit() {
   DCHECK_EQ(arraysize(kDefaultSettings),
             static_cast<size_t>(CONTENT_SETTINGS_NUM_TYPES));
 
   for (int i = 0; i < CONTENT_SETTINGS_NUM_TYPES; ++i) {
     if (default_content_settings_.settings[i] == CONTENT_SETTING_DEFAULT)
       default_content_settings_.settings[i] = kDefaultSettings[i];
   }
@@ skipping 58 matching lines @@
   if (!profile_)
     return;
   PrefService* prefs = profile_->GetPrefs();
   prefs->RemovePrefObserver(prefs::kDefaultContentSettings, this);
   prefs->RemovePrefObserver(prefs::kContentSettingsPatterns, this);
   prefs->RemovePrefObserver(prefs::kBlockThirdPartyCookies, this);
   notification_registrar_.Remove(this, NotificationType::PROFILE_DESTROYED,
                                  Source<Profile>(profile_));
   profile_ = NULL;
 }