Add ContentSettingsProvider Interface.

chrome/browser/content_settings/host_content_settings_map.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.
 
 // Maps hostnames to custom content settings.  Written on the UI thread and read
 // on any thread.  One instance per profile.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/linked_ptr.h"
 #include "base/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/content_settings/content_settings_pattern.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 
+namespace content_settings {
+
+class DefaultContentSettingsProviderInterface;
+
+}  // namespace content_settings
+
 class ContentSettingsDetails;
-class DefaultContentSettingsProvider;
 class DictionaryValue;
 class GURL;
 class PrefService;
 class Profile;
 
 class HostContentSettingsMap
     : public NotificationObserver,
       public base::RefCountedThreadSafe<HostContentSettingsMap,
                                         BrowserThread::DeleteOnUIThread> {
  public:
@@ skipping 182 matching lines @@
   PrefChangeRegistrar pref_change_registrar_;
 
   // Whether this settings map is for an OTR session.
   bool is_off_the_record_;
 
   // Whether we are currently updating preferences, this is used to ignore
   // notifications from the preferences service that we triggered ourself.
   bool updating_preferences_;
 
   // Content setting providers.
-  std::vector<linked_ptr<DefaultContentSettingsProvider> >
-      default_content_settings_providers_;
+  std::vector
+      <linked_ptr<content_settings::DefaultContentSettingsProviderInterface> >
+          default_content_settings_providers_;
 
   // Used around accesses to the following objects to guarantee thread safety.
   mutable base::Lock lock_;
 
   // Copies of the pref data, so that we can read it on threads other than the
   // UI thread.
   HostContentSettings host_content_settings_;
 
   // Differences to the preference-stored host content settings for
   // off-the-record settings.
   HostContentSettings off_the_record_settings_;
 
   // Misc global settings.
   bool block_third_party_cookies_;
   bool is_block_third_party_cookies_managed_;
   bool block_nonsandboxed_plugins_;
 
   DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_