Wires up WindowTreeClient::SetDisplayRoot()

ui/aura/mus/window_tree_host_mus_init_params.cc

 // Copyright 2017 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 "ui/aura/mus/window_tree_host_mus_init_params.h"
 
 #include "ui/aura/mus/window_port_mus.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 
 namespace aura {
 
+DisplayInitParams::DisplayInitParams() = default;
+
+DisplayInitParams::~DisplayInitParams() = default;
+
 WindowTreeHostMusInitParams::WindowTreeHostMusInitParams() = default;
 
 WindowTreeHostMusInitParams::WindowTreeHostMusInitParams(
     WindowTreeHostMusInitParams&& other) = default;
 
 WindowTreeHostMusInitParams::~WindowTreeHostMusInitParams() = default;
 
 WindowTreeHostMusInitParams CreateInitParamsForTopLevel(
     WindowTreeClient* window_tree_client,
     std::map<std::string, std::vector<uint8_t>> properties) {
   WindowTreeHostMusInitParams params;
   params.window_tree_client = window_tree_client;
   params.display_id = display::Screen::GetScreen()->GetPrimaryDisplay().id();
   // Pass |properties| to CreateWindowPortForTopLevel() so that |properties|
   // are passed to the server *and* pass |properties| to the WindowTreeHostMus
   // constructor (above) which applies the properties to the Window. Some of the
   // properties may be server specific and not applied to the Window.
   params.window_port =
       static_cast<WindowTreeHostMusDelegate*>(window_tree_client)
           ->CreateWindowPortForTopLevel(&properties);
   params.properties = std::move(properties);
   return params;
 }
 
 }  // namespace aura