Implement PermissionService::GetNextPermissionChange.

chrome/browser/content_settings/permission_context.h

+// Copyright 2015 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_PERMISSION_CONTEXT_H_
+#define CHROME_BROWSER_CONTENT_SETTINGS_PERMISSION_CONTEXT_H_
+
+#include <list>
+
+#include "components/content_settings/core/common/content_settings_types.h"
+
+class PermissionContextBase;
+class Profile;
+class KeyedServiceBaseFactory;
+
+class PermissionContext {
+ public:
+  // Helper method returning the PermissionContextBase object associated with
+  // the given ContentSettingsType.
+  static PermissionContextBase* Get(Profile* profile,
+                                    ContentSettingsType content_settings_type);
+
+  // Return all the factories related to PermissionContext. These are the
+  // factories used by ::Get() to create a PermissionContextBase.
+  // This is meant to be used by callers of ::Get() that need to depend on these
+  // factories.
+  static std::list<KeyedServiceBaseFactory*> GetFactories();
+};

[Bernhard Bauer, 2015/03/23 10:20:43]

Add DISALLOW_IMPLICIT_CONSTRUCTORS to prevent this class from being
instantiated.

+
+#endif // CHROME_BROWSER_CONTENT_SETTINGS_PERMISSION_CONTEXT_H_