Explicitly ShutdownOnUIThread the HostContentSettingsMap when destroying the Profile.

chrome/browser/content_settings/content_settings_mock_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_MOCK_PROVIDER_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_MOCK_PROVIDER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/content_settings/content_settings_provider.h"
@@ skipping 11 matching lines @@
                               bool is_managed,
                               bool can_override);
   virtual ~MockDefaultProvider();
 
   // DefaultProviderInterface implementation.
   virtual ContentSetting ProvideDefaultSetting(
       ContentSettingsType content_type) const;
   virtual void UpdateDefaultSetting(ContentSettingsType content_type,
                                     ContentSetting setting);
   virtual bool DefaultSettingIsManaged(ContentSettingsType content_type) const;
+  virtual void ShutdownOnUIThread();
 
  private:
   ContentSettingsType content_type_;
   ContentSetting setting_;
   bool is_managed_;
   bool can_override_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDefaultProvider);
 };
 
@@ skipping 27 matching lines @@
       ContentSetting content_setting);
 
   virtual void GetAllContentSettingsRules(
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier,
       Rules* content_setting_rules) const {}
 
   virtual void ClearAllContentSettingsRules(
       ContentSettingsType content_type) {}
 
+  virtual void ShutdownOnUIThread() {}
+
   // Accessors
   void set_requesting_url_pattern(ContentSettingsPattern pattern) {
     requesting_url_pattern_ = pattern;
   }
 
   ContentSettingsPattern requesting_url_pattern() const {
     return requesting_url_pattern_;
   }
 
   void set_embedding_url_pattern(ContentSettingsPattern pattern) {
@@ skipping 43 matching lines @@
   ResourceIdentifier resource_identifier_;
   ContentSetting setting_;
   bool read_only_;
 
   DISALLOW_COPY_AND_ASSIGN(MockProvider);
 };
 
 }  // namespace content_settings
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_MOCK_PROVIDER_H_