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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/webstore_private/webstore_private_api.h"
 
 #include "apps/app_launcher.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 553 matching lines @@
         kNoPreviousBeginInstallWithManifestError, id);
     return false;
   }
 
   // Balanced in OnExtensionInstallSuccess() or OnExtensionInstallFailure().
   AddRef();
 
   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());
   }
 
   // The extension will install through the normal extension install flow, but
   // the whitelist entry will bypass the normal permissions install dialog.
   scoped_refptr<WebstoreInstaller> installer = new WebstoreInstaller(
       profile(), this,
       &(dispatcher()->delegate()->GetAssociatedWebContents()->GetController()),
       id, approval_.Pass(), WebstoreInstaller::FLAG_NONE);
   installer->Start();
@@ skipping 94 matching lines @@
 }
 
 bool WebstorePrivateIsInIncognitoModeFunction::RunImpl() {
   SetResult(
       Value::CreateBooleanValue(profile_ != profile_->GetOriginalProfile()));
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions