Warm-up the App List when enabled from the webstore and not shown.

chrome/browser/extensions/api/webstore_private/webstore_private_api.cc

Index: chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
diff --git a/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc b/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
index f10848022e39bdb6fa91348974196f5693aedaf0..07cc111d178d2aa50822191c47206329a71451d4 100644
--- a/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
+++ b/chrome/browser/extensions/api/webstore_private/webstore_private_api.cc
@@ -571,10 +571,12 @@ bool WebstorePrivateCompleteInstallFunction::RunImpl() {
   if (approval_->enable_launcher)
     AppListService::Get()->EnableAppList(profile());
 
-  if (apps::IsAppLauncherEnabled()) {
+  if (apps::IsAppLauncherEnabled() && approval_->manifest->is_app()) {
     // Show the app list to show download is progressing. Don't show the app
     // list on first app install so users can be trained to open it themselves.
-    if (approval_->manifest->is_app() && !approval_->enable_launcher)
+    if (approval_->enable_launcher)
+      AppListService::Get()->CreateForProfile(profile());
+    else
       AppListService::Get()->ShowForProfile(profile());
   }