Load user custom wallpaper after browser crash.

ash/accelerators/accelerator_controller.cc

Index: ash/accelerators/accelerator_controller.cc
diff --git a/ash/accelerators/accelerator_controller.cc b/ash/accelerators/accelerator_controller.cc
index 2de0ac529868cc5a97ed8465d75ee127969121c0..a10253207e8c9495187d82205e6a5f457b596aab 100644
--- a/ash/accelerators/accelerator_controller.cc
+++ b/ash/accelerators/accelerator_controller.cc
@@ -151,10 +151,12 @@ bool HandleToggleDesktopBackgroundMode() {
   ash::DesktopBackgroundController* desktop_background_controller =
       ash::Shell::GetInstance()->desktop_background_controller();
   if (desktop_background_controller->desktop_background_mode() ==
-      ash::DesktopBackgroundController::BACKGROUND_IMAGE)
+      ash::DesktopBackgroundController::BACKGROUND_IMAGE) {
     desktop_background_controller->SetDesktopBackgroundSolidColorMode();
-  else
-    desktop_background_controller->SetLoggedInUserWallpaper();
+  } else {
+    ash::Shell::GetInstance()->user_wallpaper_delegate()->
+        SetLoggedInUserWallpaper();
+  }
   return true;
 }