ash: Display system background while loading wallpaper.

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index 52089d26d6f68cebc3468fd9a489626e74093c90..f9ca572270c30179c72bb4f4a1e2fafe729a531c 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -119,6 +119,14 @@ bool ChromeShellDelegate::IsSessionStarted() {
 #endif
 }
 
+bool ChromeShellDelegate::IsFirstRunAfterBoot() {
+#if defined(OS_CHROMEOS)
+  return CommandLine::ForCurrentProcess()->HasSwitch(switches::kFirstBoot);
+#else
+  return false;
+#endif
+}
+
 void ChromeShellDelegate::LockScreen() {
 #if defined(OS_CHROMEOS)
   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kGuestSession) &&