Add layout test for reply property of notificationclick event

content/shell/common/layout_test/layout_test_messages.h

 // Copyright 2014 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.
 
 // Multiply-included file, no traditional include guard.
 #include <string>
 #include <vector>
 
 #include "content/public/common/common_param_traits_macros.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/WebKit/public/platform/modules/permissions/permission_status.mojom.h"
 #include "url/gurl.h"
 #include "url/ipc/url_param_traits.h"
 
 #define IPC_MESSAGE_START LayoutTestMsgStart
 
 IPC_SYNC_MESSAGE_ROUTED1_1(LayoutTestHostMsg_ReadFileToString,
                            base::FilePath /* local path */,
                            std::string /* contents */)
 IPC_SYNC_MESSAGE_ROUTED1_1(LayoutTestHostMsg_RegisterIsolatedFileSystem,
                            std::vector<base::FilePath> /* absolute_filenames */,
                            std::string /* filesystem_id */)
 IPC_MESSAGE_ROUTED0(LayoutTestHostMsg_ClearAllDatabases)
 IPC_MESSAGE_ROUTED1(LayoutTestHostMsg_SetDatabaseQuota,
                     int /* quota */)
-IPC_MESSAGE_ROUTED2(LayoutTestHostMsg_SimulateWebNotificationClick,
+IPC_MESSAGE_ROUTED3(LayoutTestHostMsg_SimulateWebNotificationClick,
                     std::string /* title */,
-                    int /* action_index */)
+                    int /* action_index */,
+                    base::NullableString16 /* reply */)
 IPC_MESSAGE_ROUTED2(LayoutTestHostMsg_SimulateWebNotificationClose,
                     std::string /* title */,
                     bool /* by_user */)
 IPC_MESSAGE_ROUTED1(LayoutTestHostMsg_BlockThirdPartyCookies,
                     bool /* block */)
 IPC_MESSAGE_ROUTED0(LayoutTestHostMsg_DeleteAllCookies)
 IPC_MESSAGE_ROUTED4(LayoutTestHostMsg_SetPermission,
                     std::string /* name */,
                     blink::mojom::PermissionStatus /* status */,
                     GURL /* origin */,
                     GURL /* embedding_origin */)
 IPC_MESSAGE_ROUTED0(LayoutTestHostMsg_ResetPermissions)
 
 // Notifies the browser that one of renderers has changed layout test runtime
 // flags (i.e. has set dump_as_text).
 IPC_MESSAGE_CONTROL1(
     LayoutTestHostMsg_LayoutTestRuntimeFlagsChanged,
     base::DictionaryValue /* changed_layout_test_runtime_flags */)
 
 // Used send flag changes to renderers - either when
 // 1) broadcasting change happening in one renderer to all other renderers, or
 // 2) sending accumulated changes to a single new renderer.
 IPC_MESSAGE_CONTROL1(
     LayoutTestMsg_ReplicateLayoutTestRuntimeFlagsChanges,
     base::DictionaryValue /* changed_layout_test_runtime_flags */)
 
 // Sent by secondary test window to notify the test has finished.
 IPC_MESSAGE_CONTROL0(LayoutTestHostMsg_TestFinishedInSecondaryRenderer)