Load shelf preferences from ChromeLauncherController::AttachProfile.

chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
index 5a9ada19823991b1c134706223d800eab31f20d6..45e4e9da25c94d3914ab9d31356537e0846706b5 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
@@ -148,6 +148,8 @@ void ChromeLauncherController::AttachProfile(Profile* profile_to_attach) {
             profile_, extension_misc::EXTENSION_ICON_SMALL, this);
     app_icon_loaders_.push_back(std::move(arc_app_icon_loader));
   }
+
+  SetShelfBehaviorsFromPrefs();
 }
 
 void ChromeLauncherController::OnShelfCreated(int64_t display_id) {