Fix stack-use-after-scope in ChromeOS OOBE handler.

chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc b/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
index fb2ed5a29d8806aba2c55c80cf21bf9037816a00..6f5f7d2152039757a72b6bfaaeb2606d03a1ea96 100644
--- a/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
@@ -480,7 +480,7 @@ void CoreOobeHandler::UpdateKeyboardState() {
 }
 
 void CoreOobeHandler::UpdateClientAreaSize() {
-  const gfx::Size& size =
+  const gfx::Size size =
       display::Screen::GetScreen()->GetPrimaryDisplay().size();
   SetClientAreaSize(size.width(), size.height());
 }