ash: HiDPI user avatar for SessionController

ash/common/system/user/user_card_view.cc

Index: ash/common/system/user/user_card_view.cc
diff --git a/ash/common/system/user/user_card_view.cc b/ash/common/system/user/user_card_view.cc
index bf56606b5cab54faf2e6c6044c4d54577308c89c..dace052ecfe3393c6dea11f7b64c67684abd4a1b 100644
--- a/ash/common/system/user/user_card_view.cc
+++ b/ash/common/system/user/user_card_view.cc
@@ -65,9 +65,7 @@ views::View* CreateUserAvatarView(LoginStatus login_status, int user_index) {
     image_view->SetImage(icon, icon.size());
   } else {
     SessionController* controller = Shell::Get()->session_controller();
-    // TODO(xiyuan); HiDpi avatar support. http://crbug.com/702689
-    image_view->SetImage(gfx::ImageSkia::CreateFrom1xBitmap(
-                             controller->GetUserSession(user_index)->avatar),
+    image_view->SetImage(controller->GetUserSession(user_index)->avatar,
                          gfx::Size(kTrayItemSize, kTrayItemSize));
   }