mus: Remove unnecessary const from property TypeConverter templates

mash/login/login.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 "mash/login/login.h"
 
 #include <map>
 
 #include "base/guid.h"
 #include "base/macros.h"
@@ skipping 30 matching lines @@
 
     views::WindowManagerConnection::Create(connector);
 
     views::Widget* widget = new views::Widget;
     views::Widget::InitParams params(
         views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
     params.delegate = ui;
 
     std::map<std::string, std::vector<uint8_t>> properties;
     properties[mash::wm::mojom::kWindowContainer_Property] =
-        mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
+        mojo::ConvertTo<std::vector<uint8_t>>(
             static_cast<int32_t>(mash::wm::mojom::Container::LOGIN_WINDOWS));
     mus::Window* window =
         views::WindowManagerConnection::Get()->NewWindow(properties);
     params.native_widget = new views::NativeWidgetMus(
         widget, connector, window, mus::mojom::SurfaceType::DEFAULT);
     widget->Init(params);
     widget->Show();
   }
 
  private:
@@ skipping 136 matching lines @@
 }
 
 }  // namespace
 
 mojo::ShellClient* CreateLogin() {
   return new Login;
 }
 
 }  // namespace login
 }  // namespace main