ash: Display system background while loading wallpaper.

ash/shell/shell_delegate_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/shell/shell_delegate_impl.h"
 
 #include "ash/caps_lock_delegate_stub.h"
 #include "ash/shell/example_factory.h"
 #include "ash/shell/launcher_delegate_impl.h"
 #include "ash/shell/toplevel_window.h"
@@ skipping 21 matching lines @@
 }
 
 bool ShellDelegateImpl::IsUserLoggedIn() {
   return true;
 }
 
 bool ShellDelegateImpl::IsSessionStarted() {
   return true;
 }
 
+bool ShellDelegateImpl::IsFirstRunAfterBoot() {
+  return false;
+}
+
 void ShellDelegateImpl::LockScreen() {
   ash::shell::CreateLockScreen();
   locked_ = true;
   ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
 
 void ShellDelegateImpl::UnlockScreen() {
   locked_ = false;
   ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
@@ skipping 101 matching lines @@
 
 void ShellDelegateImpl::SaveScreenMagnifierScale(double scale) {
 }
 
 double ShellDelegateImpl::GetSavedScreenMagnifierScale() {
   return std::numeric_limits<double>::min();
 }
 
 }  // namespace shell
 }  // namespace ash