Detach the dependency from host_content_settings_map to extension.

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_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 23 matching lines @@
       const ContentSettingsPattern& embedding_url_pattern,
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier,
       base::Value* value) OVERRIDE;
 
   virtual void ClearAllContentSettingsRules(
       ContentSettingsType content_type) OVERRIDE {}
 
   virtual void ShutdownOnUIThread() OVERRIDE;
 
+  virtual std::string GetProviderName() const OVERRIDE;
+
+  virtual SettingSource GetSettingSource() const OVERRIDE;
+
   void set_read_only(bool read_only) {
     read_only_ = read_only;
   }
 
   bool read_only() const {
     return read_only_;
   }
 
  private:
   OriginIdentifierValueMap value_map_;
   bool read_only_;
 
   DISALLOW_COPY_AND_ASSIGN(MockProvider);
 };
 
 }  // namespace content_settings
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_MOCK_PROVIDER_H_