[cros] Initialize OOBE in parallel when boot animation is disabled.

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index d6f6234736eb53cfecdbc845ff7800de59be5777..9f12009f1004b0d30cc985c68c10e41fa9019ea2 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -29,7 +29,7 @@ bool TestShellDelegate::IsUserLoggedIn() {
   return true;
 }
 
-bool TestShellDelegate::IsSessionStarted() {
+bool TestShellDelegate::IsSessionStarted() const {
   return true;
 }
 
@@ -45,6 +45,10 @@ bool TestShellDelegate::IsScreenLocked() const {
   return locked_;
 }
 
+bool TestShellDelegate::IsStatusAreaInitiallyVisible() const {
+  return true;
+}
+
 void TestShellDelegate::Shutdown() {
 }