Implement PermissionService::GetNextPermissionChange.

content/shell/browser/shell_permission_manager.cc

 // 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.
 
 #include "content/shell/browser/shell_permission_manager.h"
 
 #include "base/callback.h"
 #include "content/public/browser/permission_type.h"
 
 namespace content {
@@ skipping 35 matching lines @@
     const GURL& embedding_origin) {
   return PERMISSION_STATUS_DENIED;
 }
 
 void ShellPermissionManager::RegisterPermissionUsage(
     PermissionType permission,
     const GURL& requesting_origin,
     const GURL& embedding_origin) {
 }
 
+int ShellPermissionManager::SubscribePermissionStatusChange(
+    PermissionType permission,
+    const GURL& requesting_origin,
+    const GURL& embedding_origin,
+    const base::Callback<void(PermissionStatus)>& callback) {
+  return -1;
+}
+
+void ShellPermissionManager::UnsubscribePermissionStatusChange(
+    int subscription_id) {
+}
+
 }  // namespace content