Implement preference and policy based content settings providers.

chrome/browser/content_settings/mock_content_settings_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_MOCK_CONTENT_SETTINGS_PROVIDER_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_MOCK_CONTENT_SETTINGS_PROVIDER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/content_settings/content_settings_provider.h"
 
 class MockContentSettingsProvider : public ContentSettingsProviderInterface {
  public:
   // Create a content settings provider that provides a given setting for a
   // given type.
   MockContentSettingsProvider(ContentSettingsType content_type,
                               ContentSetting setting,
                               bool is_managed,
                               bool can_override);
   virtual ~MockContentSettingsProvider();
 
   // ContentSettingsProviderInterface implementation.
-  virtual bool CanProvideDefaultSetting(ContentSettingsType content_type);
+  virtual bool CanProvideDefaultSetting(ContentSettingsType content_type) const;
   virtual ContentSetting ProvideDefaultSetting(
-      ContentSettingsType content_type);
+      ContentSettingsType content_type) const;
   virtual void UpdateDefaultSetting(ContentSettingsType content_type,
                                     ContentSetting setting);
-  virtual bool DefaultSettingIsManaged(ContentSettingsType content_type);
+  virtual void ResetToDefaults();
+  virtual bool DefaultSettingIsManaged(ContentSettingsType content_type) const;
 
  private:
   ContentSettingsType content_type_;
   ContentSetting setting_;
   bool is_managed_;
   bool can_override_;
 
   DISALLOW_COPY_AND_ASSIGN(MockContentSettingsProvider);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_MOCK_CONTENT_SETTINGS_PROVIDER_H_