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

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 383218d424358ebb7b14f8c58562da43951b2c78..0be6344795e8c9651b5b300cbbe5e2fc65860645 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -34,7 +34,7 @@ bool ShellDelegateImpl::IsUserLoggedIn() {
   return true;
 }
 
-bool ShellDelegateImpl::IsSessionStarted() {
+bool ShellDelegateImpl::IsSessionStarted() const {
   return true;
 }
 
@@ -53,6 +53,10 @@ bool ShellDelegateImpl::IsScreenLocked() const {
   return locked_;
 }
 
+bool ShellDelegateImpl::IsStatusAreaInitiallyVisible() const {
+  return true;
+}
+
 void ShellDelegateImpl::Shutdown() {
 }