[Athena] minimum impl to add screen/background and test windows

athena/main/athena_main.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 "apps/shell/app/shell_main_delegate.h"
 #include "apps/shell/browser/shell_browser_main_delegate.h"
+#include "apps/shell/browser/shell_desktop_controller.h"
+#include "athena/main/main_util.h"
+#include "athena/screen/public/screen_manager.h"
+#include "athena/wm/public/window_manager.h"
 #include "content/public/app/content_main.h"
+#include "ui/aura/window_tree_host.h"
 
 class AthenaBrowserMainDelegate : public apps::ShellBrowserMainDelegate {
  public:
   AthenaBrowserMainDelegate() {}
   virtual ~AthenaBrowserMainDelegate() {}
 
   // apps::ShellBrowserMainDelegate:
-  virtual void Start(content::BrowserContext* context) OVERRIDE {}
-  virtual void Shutdown() OVERRIDE {}
+  virtual void Start(content::BrowserContext* context) OVERRIDE {
+    athena::ScreenManager::Create(apps::ShellDesktopController::instance()
+                                         ->GetWindowTreeHost()
+                                         ->window());
+    athena::WindowManager::Create();
+
+    SetupBackgroundImage();
+    CreateTestApp();
+  }
+
+  virtual void Shutdown() OVERRIDE {
+    athena::WindowManager::Shutdown();
+    athena::ScreenManager::Shutdown();
+  }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AthenaBrowserMainDelegate);
 };
 
 class AthenaMainDelegate : public apps::ShellMainDelegate {
  public:
   AthenaMainDelegate() {}
   virtual ~AthenaMainDelegate() {}
 
  private:
   // apps::ShellMainDelegate:
   virtual apps::ShellBrowserMainDelegate* CreateShellBrowserMainDelegate()
       OVERRIDE {
     return new AthenaBrowserMainDelegate();
   }
 
   DISALLOW_COPY_AND_ASSIGN(AthenaMainDelegate);
 };
 
 int main(int argc, const char** argv) {
   AthenaMainDelegate delegate;
   content::ContentMainParams params(&delegate);
 
   params.argc = argc;
   params.argv = argv;
 
   return content::ContentMain(params);
 }