Ensure compositor initialized before WindowTreeHost is Shown.

services/ui/ws/window_manager_client_unittest.cc

 // Copyright 2014 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 <stdint.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 685 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(EstablishConnectionViaFactoryDelegate);
 };
 
 TEST_F(WindowServerTest, EstablishConnectionViaFactory) {
   EstablishConnectionViaFactoryDelegate delegate(window_manager());
   set_window_manager_delegate(&delegate);
   aura::WindowTreeClient second_client(connector(), this);
   second_client.ConnectViaWindowTreeFactory();
   aura::WindowTreeHostMus window_tree_host_in_second_client(&second_client);
+  window_tree_host_in_second_client.InitHost();
   ASSERT_TRUE(second_client.GetRoots().count(
                   window_tree_host_in_second_client.window()) > 0);
   // Wait for the window to appear in the wm.
   ASSERT_TRUE(delegate.QuitOnCreate());
 
   aura::Window* window_in_wm = delegate.created_window();
   ASSERT_TRUE(window_in_wm);
 
   // Change the bounds in the wm, and make sure the child sees it.
   const gfx::Rect window_bounds(1, 11, 12, 101);
@@ skipping 35 matching lines @@
   ASSERT_EQ(1u, top_level_in_wm->children().size());
   aura::Window* second_client_child_in_wm = top_level_in_wm->children()[0];
   ASSERT_EQ(1u, second_client_child_in_wm->children().size());
   aura::Window* transient_in_wm = second_client_child_in_wm->children()[0];
   ASSERT_EQ(second_client_child_in_wm,
             transient_window_client->GetTransientParent(transient_in_wm));
 }
 
 }  // namespace ws
 }  // namespace ui