Restore to user selected wallpaper after browser crash

chrome/browser/ui/views/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/views/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
index 7982438c472d018820cfb02b592da418c26c3ae3..f91ad87d273f0be031eca6158d7899959ed1c977 100644
--- a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
@@ -19,6 +19,7 @@
 #include "ui/aura/window.h"
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/background/desktop_background_observer.h"
 #include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
 #include "chrome/browser/chromeos/dbus/power_manager_client.h"
 #include "chrome/browser/chromeos/system/ash_system_tray_delegate.h"
@@ -109,3 +110,11 @@ ash::SystemTrayDelegate* ChromeShellDelegate::CreateSystemTrayDelegate(
   return NULL;
 #endif
 }
+
+ash::UserWallpaperDelegate* ChromeShellDelegate::CreateUserWallpaperDelegate() {
+#if defined(OS_CHROMEOS)
+  return chromeos::CreateUserWallpaperDelegate();
+#else
+  return NULL;
+#endif
+}