[Policy Experimental] Add policies to allow Cookies and Pop-ups exceptions.

components/content_settings/core/browser/content_settings_policy_provider.h

Index: components/content_settings/core/browser/content_settings_policy_provider.h
diff --git a/components/content_settings/core/browser/content_settings_policy_provider.h b/components/content_settings/core/browser/content_settings_policy_provider.h
index f2058456a24949fde95f63ec1d912f6c53506d9e..31b14f39a3dc05f202b432869dfe2b89aa16982a 100644
--- a/components/content_settings/core/browser/content_settings_policy_provider.h
+++ b/components/content_settings/core/browser/content_settings_policy_provider.h
@@ -7,12 +7,14 @@
 
 // A content settings provider that takes its settings out of policies.
 
+#include <map>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/synchronization/lock.h"
 #include "components/content_settings/core/browser/content_settings_observable_provider.h"
 #include "components/content_settings/core/browser/content_settings_origin_identifier_value_map.h"
+#include "components/content_settings/core/common/content_settings.h"
 #include "components/prefs/pref_change_registrar.h"
 
 class PrefService;
@@ -46,14 +48,26 @@ class PolicyProvider : public ObservableProvider {
 
   void ShutdownOnUIThread() override;
 
+  // Returns whether user to set and use exceptions for |content_type|:
+  // USER_EXCEPTIONS_DEFAULT: Allowed only if no policy default is set.
+  // USER_EXCEPTIONS_ALLOW: Allowed.
+  ContentSettingsUserExceptionsUsage GetUserExceptionsUsageSettingForType(
+      ContentSettingsType content_type) const;
+
  private:
   struct PrefsForManagedDefaultMapEntry;
 
+  using UserExceptionsUsageSettingsMap =
+      std::map<ContentSettingsType, ContentSettingsUserExceptionsUsage>;
+
   static const PrefsForManagedDefaultMapEntry kPrefsForManagedDefault[];
 
   // Reads the policy managed default settings.
   void ReadManagedDefaultSettings();
 
+  // Reads the policy managed settings on user exceptions usage.
+  void ReadUserExceptionsUsageSettings();
+
   // Callback for preference changes.
   void OnPreferenceChanged(const std::string& pref_name);
 
@@ -71,6 +85,10 @@ class PolicyProvider : public ObservableProvider {
 
   OriginIdentifierValueMap value_map_;
 
+  // Preference exceptions can be explictly enabled or disabled by policy for
+  // various content types. Only non-CONTENT_SETTING_DEFAULT values are stored.
+  UserExceptionsUsageSettingsMap user_exceptions_usage_settings_map_;
+
   PrefService* prefs_;
 
   PrefChangeRegistrar pref_change_registrar_;