Explicitly ShutdownOnUIThread the HostContentSettingsMap when destroying the Profile.

chrome/browser/content_settings/content_settings_mock_provider.cc

 // Copyright (c) 2011 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/content_settings/content_settings_mock_provider.h"
 
 namespace content_settings {
 
 MockDefaultProvider::MockDefaultProvider(
     ContentSettingsType content_type,
@@ skipping 19 matching lines @@
     ContentSetting setting) {
   if (can_override_ && content_type == content_type_)
     setting_ = setting;
 }
 
 bool MockDefaultProvider::DefaultSettingIsManaged(
     ContentSettingsType content_type) const {
   return content_type == content_type_ && is_managed_;
 }
 
+void MockDefaultProvider::ShutdownOnUIThread() {
+}
+
 MockProvider::MockProvider()
     : requesting_url_pattern_(ContentSettingsPattern()),
       embedding_url_pattern_(ContentSettingsPattern()),
       content_type_(CONTENT_SETTINGS_TYPE_COOKIES),
       resource_identifier_(""),
       setting_(CONTENT_SETTING_DEFAULT),
       read_only_(false) {}
 
 MockProvider::MockProvider(ContentSettingsPattern requesting_url_pattern,
                            ContentSettingsPattern embedding_url_pattern,
@@ skipping 33 matching lines @@
   if (read_only_)
     return;
   requesting_url_pattern_ = ContentSettingsPattern(requesting_url_pattern);
   embedding_url_pattern_ = ContentSettingsPattern(embedding_url_pattern);
   content_type_ = content_type;
   resource_identifier_ = resource_identifier;
   setting_ = content_setting;
 }
 
 }  // namespace content_settings