Refactor kiosk app launch to be part of login screen UI flow.

chrome/browser/chromeos/login/login_display_host_impl.h

Index: chrome/browser/chromeos/login/login_display_host_impl.h
diff --git a/chrome/browser/chromeos/login/login_display_host_impl.h b/chrome/browser/chromeos/login/login_display_host_impl.h
index 8d25d3f320d1fba9c326cb2e0ee2ea81c5925b19..fd1f0ec4483d98a859cdf326db84b2c5690dc9b2 100644
--- a/chrome/browser/chromeos/login/login_display_host_impl.h
+++ b/chrome/browser/chromeos/login/login_display_host_impl.h
@@ -10,6 +10,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/login/app_launch_controller.h"
 #include "chrome/browser/chromeos/login/auth_prewarmer.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/login_display.h"
@@ -72,6 +73,7 @@ class LoginDisplayHostImpl : public LoginDisplayHost,
   virtual void ResumeSignInScreen() OVERRIDE;
   virtual void OnPreferencesChanged() OVERRIDE;
   virtual void PrewarmAuthentication() OVERRIDE;
+  virtual void StartAppLaunch(const std::string& app_id) OVERRIDE;
 
   // Creates WizardController instance.
   WizardController* CreateWizardController();
@@ -153,6 +155,9 @@ class LoginDisplayHostImpl : public LoginDisplayHost,
   // OOBE and some screens (camera, recovery) controller.
   scoped_ptr<WizardController> wizard_controller_;
 
+  // App launch controller.
+  scoped_ptr<AppLaunchController> app_launch_controller_;
+
   // Client for enterprise auto-enrollment check.
   scoped_ptr<policy::AutoEnrollmentClient> auto_enrollment_client_;