Making WTH::InitCompositor() protected instead of public.

ash/mus/window_manager.cc

 // Copyright 2015 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 "ash/mus/window_manager.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 194 matching lines @@
   observers_.RemoveObserver(observer);
 }
 
 display::mojom::DisplayController* WindowManager::GetDisplayController() {
   return display_controller_ ? display_controller_.get() : nullptr;
 }
 
 RootWindowController* WindowManager::CreateRootWindowController(
     std::unique_ptr<aura::WindowTreeHostMus> window_tree_host,
     const display::Display& display) {
-  window_tree_host->InitCompositor();
+  window_tree_host->InitHost();

[sky, 2016/12/06 17:58:02]

Should we do this in WindowTreeClient::OnWmNewDisplay before it calls to the
delegate?

[mfomitchev, 2016/12/06 18:01:18]

Ok, yeah, that would make sense. I'll do it in
https://codereview.chromium.org/2552003002/ then, since that would fix some of
the tests.

   // TODO(sky): this is temporary, should use RootWindowController directly.
   aura::client::SetCaptureClient(window_tree_host->window(),
                                  wm_state_->capture_controller());
   aura::client::SetFocusClient(window_tree_host->window(),
                                focus_controller_.get());
   aura::client::SetActivationClient(window_tree_host->window(),
                                     focus_controller_.get());
   aura::client::SetEventClient(window_tree_host->window(), event_client_.get());
   aura::client::SetScreenPositionClient(window_tree_host->window(),
                                         screen_position_controller_.get());
@@ skipping 277 matching lines @@
 
 void WindowManager::OnWindowInitialized(aura::Window* window) {
   // This ensures WmWindowAura won't be called before WmWindowMus. This is
   // important as if WmWindowAura::Get() is called first, then WmWindowAura
   // would be created, not WmWindowMus.
   WmWindowMus::Get(window);
 }
 
 }  // namespace mus
 }  // namespace ash