Replace the HomeCard by the AppList in Athena.

apps/shell/browser/shell_desktop_controller.cc

Index: apps/shell/browser/shell_desktop_controller.cc
diff --git a/apps/shell/browser/shell_desktop_controller.cc b/apps/shell/browser/shell_desktop_controller.cc
index 752b198a9d02867297f6eb6ca8c56751657f313c..26760407207364d1df1eaf7dfffe31a4363413ca 100644
--- a/apps/shell/browser/shell_desktop_controller.cc
+++ b/apps/shell/browser/shell_desktop_controller.cc
@@ -253,8 +253,11 @@ void ShellDesktopController::CreateRootWindow() {
 }
 
 void ShellDesktopController::InitWindowManager() {
-  focus_client_.reset(new wm::FocusController(new AppsFocusRules()));
-  aura::client::SetFocusClient(host_->window(), focus_client_.get());
+  wm::FocusController* focus_controller =
+      new wm::FocusController(new AppsFocusRules());
+  aura::client::SetFocusClient(host_->window(), focus_controller);
+  host_->window()->AddPreTargetHandler(focus_controller);
+  focus_client_.reset(focus_controller);
 
   input_method_filter_.reset(
       new wm::InputMethodEventFilter(host_->GetAcceleratedWidget()));