Add content_settings::PolicyProvider and a set of new policies to managed content settings.

chrome/browser/content_settings/content_settings_policy_provider.h

Index: chrome/browser/content_settings/content_settings_policy_provider.h
diff --git a/chrome/browser/content_settings/content_settings_policy_provider.h b/chrome/browser/content_settings/content_settings_policy_provider.h
index 82aaf260fea9d71c81abb4ab2437c4f6aa514dfa..8f5042efb34599e5458a60bcec81902e5eec101a 100644
--- a/chrome/browser/content_settings/content_settings_policy_provider.h
+++ b/chrome/browser/content_settings/content_settings_policy_provider.h
@@ -11,6 +11,7 @@
 #include "base/basictypes.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/content_settings/content_settings_provider.h"
+#include "chrome/browser/content_settings/content_settings_base_provider.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
@@ -76,6 +77,61 @@ class PolicyDefaultProvider : public DefaultProviderInterface,
   DISALLOW_COPY_AND_ASSIGN(PolicyDefaultProvider);
 };
 
+// PolicyProvider that provider managed content-settings.
+class PolicyProvider : public BaseProvider,
+                       public NotificationObserver {
+ public:
+  explicit PolicyProvider(Profile* profile);
+  ~PolicyProvider();
+  static void RegisterUserPrefs(PrefService* prefs);
+
+  // BaseProvider Implementation
+  virtual void Init();
+
+  // ProviderInterface Implementation
+  virtual bool ContentSettingsTypeIsManaged(
+      ContentSettingsType content_type);
+
+  virtual void SetContentSetting(
+      const ContentSettingsPattern& requesting_pattern,
+      const ContentSettingsPattern& embedding_pattern,
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier,
+      ContentSetting content_setting);
+
+  virtual void ClearAllContentSettingsRules(
+      ContentSettingsType content_type);
+
+  virtual void ResetToDefaults();
+
+  // NotificationObserver implementation.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+ private:
+  void ReadManagedContentSettings(bool overwrite);
+
+  void ReadManagedContentSettingsTypes(
+      ContentSettingsType content_type);
+
+  void GetPatternsFromPref(const char* pref_name,
+                           ContentSettingsType content_type,
+                           ContentSetting setting);
+
+  void NotifyObservers(const ContentSettingsDetails& details);
+
+  void UnregisterObservers();
+
+  Profile* profile_;
+
+  bool content_type_is_managed_[CONTENT_SETTINGS_NUM_TYPES];
+
+  PrefChangeRegistrar pref_change_registrar_;
+  NotificationRegistrar notification_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(PolicyProvider);
+};
+
 }  // namespace content_settings
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_POLICY_PROVIDER_H_