Add initial home card impl.

athena/main/athena_main.cc

Index: athena/main/athena_main.cc
diff --git a/athena/main/athena_main.cc b/athena/main/athena_main.cc
index 8e8cc63a7b8a55ec1a6ee3781f9245e26a25202b..8c6e7aba36b2683b498e6639b33d4acc81cf5c66 100644
--- a/athena/main/athena_main.cc
+++ b/athena/main/athena_main.cc
@@ -5,11 +5,14 @@
 #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/home/public/home_card.h"
 #include "athena/main/placeholder.h"
 #include "athena/screen/public/screen_manager.h"
 #include "athena/wm/public/window_manager.h"
+#include "base/memory/scoped_ptr.h"
 #include "content/public/app/content_main.h"
 #include "ui/aura/window_tree_host.h"
+#include "ui/wm/core/visibility_controller.h"
 
 class AthenaBrowserMainDelegate : public apps::ShellBrowserMainDelegate {
  public:
@@ -18,20 +21,29 @@ class AthenaBrowserMainDelegate : public apps::ShellBrowserMainDelegate {
 
   // apps::ShellBrowserMainDelegate:
   virtual void Start(content::BrowserContext* context) OVERRIDE {
-    athena::ScreenManager::Create(apps::ShellDesktopController::instance()
-                                      ->GetWindowTreeHost()
-                                      ->window());
+    aura::Window* root_window =
+        apps::ShellDesktopController::instance()->GetWindowTreeHost()->window();
+    visibility_controller_.reset(new ::wm::VisibilityController);
+    aura::client::SetVisibilityClient(root_window,
+                                      visibility_controller_.get());
+
+    athena::ScreenManager::Create(root_window);
     athena::WindowManager::Create();
+    athena::HomeCard::Create();
 
     SetupBackgroundImage();
     CreateTestWindows();
   }
 
   virtual void Shutdown() OVERRIDE {
+    athena::HomeCard::Shutdown();
     athena::WindowManager::Shutdown();
     athena::ScreenManager::Shutdown();
+    visibility_controller_.reset();
   }
 
+  scoped_ptr< ::wm::VisibilityController> visibility_controller_;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(AthenaBrowserMainDelegate);
 };