Makes WindowTreeHost::InitHost() not Show the window

blimp/engine/session/blimp_engine_session.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 "blimp/engine/session/blimp_engine_session.h"
 
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 272 matching lines @@
 }
 
 void BlimpEngineSession::Initialize() {
   DCHECK(!display::Screen::GetScreen());
   display::Screen::SetScreenInstance(screen_.get());
 
   window_tree_host_.reset(new BlimpWindowTreeHost());
 
   screen_->set_window_tree_host(window_tree_host_.get());
   window_tree_host_->InitHost();
+  window_tree_host_->window()->Show();
   window_tree_host_->window()->SetLayoutManager(
       new BlimpLayoutManager(window_tree_host_->window()));
   focus_client_.reset(new wm::FocusController(new FocusRulesImpl));
   aura::client::SetFocusClient(window_tree_host_->window(),
                                focus_client_.get());
   aura::client::SetActivationClient(window_tree_host_->window(),
                                     focus_client_.get());
   capture_client_.reset(
       new aura::client::DefaultCaptureClient(window_tree_host_->window()));
 
@@ skipping 277 matching lines @@
     parent->AddChild(content);
   content->Show();
 
   tab_ = base::MakeUnique<Tab>(std::move(new_contents), target_tab_id,
                                &render_widget_feature_,
                                navigation_message_sender_.get());
 }
 
 }  // namespace engine
 }  // namespace blimp