Allow default desktop content settings to be managed via policy

chrome/browser/geolocation/geolocation_content_settings_map.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.
 
 // Maps [requesting_origin, embedder] to content settings.  Written on the UI
 // thread and read on any thread.  One instance per profile. This is based on
 // HostContentSettingsMap but differs significantly in two aspects:
 // - It maps [requesting_origin.GetOrigin(), embedder.GetOrigin()] => setting
 //   rather than host => setting.
 // - It manages only Geolocation.
 
 #ifndef CHROME_BROWSER_GEOLOCATION_GEOLOCATION_CONTENT_SETTINGS_MAP_H_
 #define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_CONTENT_SETTINGS_MAP_H_
 #pragma once
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/ref_counted.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"
 #include "googleurl/src/gurl.h"
 
+class ContentSettingsDetails;
 class DictionaryValue;
 class PrefService;
 class Profile;
 
 class GeolocationContentSettingsMap
-    : public base::RefCountedThreadSafe<GeolocationContentSettingsMap> {
+    : public base::RefCountedThreadSafe<GeolocationContentSettingsMap>,
+      public NotificationObserver {
  public:
   typedef std::map<GURL, ContentSetting> OneOriginSettings;
   typedef std::map<GURL, OneOriginSettings> AllOriginsSettings;
 
   explicit GeolocationContentSettingsMap(Profile* profile);
 
   static void RegisterUserPrefs(PrefService* prefs);
 
   // Returns the default setting.
   //
   // This should only be called on the UI thread.
   ContentSetting GetDefaultContentSetting() const;
 
+  // Returns true if the content setting is managed (set by a policy).
+  bool IsDefaultContentSettingManaged() const;
+
   // Returns a single ContentSetting which applies to the given |requesting_url|
   // when embedded in a top-level page from |embedding_url|.  To determine the
   // setting for a top-level page, as opposed to a frame embedded in a page,
   // pass the page's URL for both arguments.
   //
   // This should only be called on the UI thread.
   // Both arguments should be valid GURLs.
   ContentSetting GetContentSetting(const GURL& requesting_url,
                                    const GURL& embedding_url) const;
 
@@ skipping 21 matching lines @@
   // a valid GURL, and |embedding_url| should be valid or empty.
   void SetContentSetting(const GURL& requesting_url,
                          const GURL& embedding_url,
                          ContentSetting setting);
 
   // Resets all settings.
   //
   // This should only be called on the UI thread.
   void ResetToDefault();
 
+  // NotificationObserver implementation.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
  private:
   friend class base::RefCountedThreadSafe<GeolocationContentSettingsMap>;
 
   // The default setting.
   static const ContentSetting kDefaultSetting;
 
+  // Sends a CONTENT_SETTINGS_CHANGED notification.
+  void NotifyObservers(const ContentSettingsDetails& details);
+
+  void UnregisterObservers();
+
   ~GeolocationContentSettingsMap();

[jochen (gone - plz use gerrit), 2010/12/15 14:02:11]

destructor should come before other methods. also, please group the static
methods together

[markusheintz_, 2010/12/15 14:08:35]

Done.

 
   // Sets the fields of |one_origin_settings| based on the values in
   // |dictionary|.
   static void GetOneOriginSettingsFromDictionary(
       const DictionaryValue* dictionary,
       OneOriginSettings* one_origin_settings);
 
   // The profile we're associated with.
   Profile* profile_;
 
+  // Registrar to register for PREF_CHANGED notifications.
+  PrefChangeRegistrar prefs_registrar_;
+  NotificationRegistrar notification_registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(GeolocationContentSettingsMap);
 };
 
 #endif  // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_CONTENT_SETTINGS_MAP_H_