Delay wallpaper load by 2 * average wallpaper load time.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
index 6da5ba9c923e818de77d2d7f2eb27ad967dbb603..1ef435c42e3545c02a8d7c5b691a1ef31257230e 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
@@ -17,6 +17,7 @@
 #include "chrome/browser/chromeos/login/login_display.h"
 #include "chrome/browser/chromeos/login/screens/error_screen_actor.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/browser/chromeos/login/wallpaper_manager.h"
 #include "chrome/browser/chromeos/net/network_portal_detector.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
@@ -173,7 +174,8 @@ class SigninScreenHandler
       public LoginDisplayWebUIHandler,
       public SystemKeyEventListener::CapsLockObserver,
       public content::NotificationObserver,
-      public NetworkStateInformer::NetworkStateInformerObserver {
+      public NetworkStateInformer::NetworkStateInformerObserver,
+      public WallpaperManager::Observer {
  public:
   SigninScreenHandler(
       const scoped_refptr<NetworkStateInformer>& network_state_informer,
@@ -206,6 +208,9 @@ class SigninScreenHandler
     kiosk_enable_flow_aborted_callback_for_test_ = callback;
   }
 
+  // From WallpaperManager::Observer
+  virtual void OnWallpaperAnimationFinished(const std::string& email) OVERRIDE;
+
  private:
   enum UIState {
     UI_STATE_UNKNOWN = 0,