Add VideoLayout message.

remoting/test/test_chromoting_client.h

Index: remoting/test/test_chromoting_client.h
diff --git a/remoting/test/test_chromoting_client.h b/remoting/test/test_chromoting_client.h
index 33e69f604ffa1ebec49602f1b1547a3deb5e68fe..f8a4551622b26c3d8948e563adec6bfeb704b2ef 100644
--- a/remoting/test/test_chromoting_client.h
+++ b/remoting/test/test_chromoting_client.h
@@ -85,6 +85,8 @@ class TestChromotingClient : public ClientUserInterface,
   void SetPairingResponse(
       const protocol::PairingResponse& pairing_response) override;
   void DeliverHostMessage(const protocol::ExtensionMessage& message) override;
+  void SetDesktopSize(const webrtc::DesktopSize& size,
+                      const webrtc::DesktopVector& dpi) override;
   protocol::ClipboardStub* GetClipboardStub() override;
   protocol::CursorShapeStub* GetCursorShapeStub() override;