Add VideoLayout message.

remoting/host/security_key/gnubby_extension_session_unittest.cc

 // Copyright 2016 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 <stddef.h>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_writer.h"
 #include "base/macros.h"
@@ skipping 47 matching lines @@
   void SetCapabilities(const protocol::Capabilities& capabilities) override {}
 
   void SetPairingResponse(
       const protocol::PairingResponse& pairing_response) override {}
 
   void DeliverHostMessage(const protocol::ExtensionMessage& message) override {
     message_ = message;
     run_loop_->Quit();
   }
 
+  void SetVideoLayout(const protocol::VideoLayout& layout) override {}
+
   // protocol::ClipboardStub implementation.
   void InjectClipboardEvent(const protocol::ClipboardEvent& event) override {}
 
   // protocol::CursorShapeStub implementation.
   void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) override {}
 
   void WaitForDeliverHostMessage(base::TimeDelta max_timeout) {
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE, run_loop_->QuitClosure(), max_timeout);
     run_loop_->Run();
@@ skipping 290 matching lines @@
   mock_gnubby_auth_handler_->GetSendMessageCallback().Run(42, "test_msg");
 
   client_stub_.WaitForDeliverHostMessage(
       base::TimeDelta::FromMilliseconds(500));
 
   // Expects a JSON array of the ASCII character codes for "test_msg".
   client_stub_.CheckHostDataMessage(42, "[116,101,115,116,95,109,115,103]");
 }
 
 }  // namespace remoting