Not show the launcher during Chrome app installation

chrome/browser/extensions/webstore_installer.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/webstore_installer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <limits>
 #include <set>
@@ skipping 227 matching lines @@
 void WebstoreInstaller::Delegate::OnExtensionDownloadProgress(
     const std::string& id,
     content::DownloadItem* item) {
 }
 
 WebstoreInstaller::Approval::Approval()
     : profile(NULL),
       use_app_installed_bubble(false),
       skip_post_install_ui(false),
       skip_install_dialog(false),
-      enable_launcher(false),
       manifest_check_level(MANIFEST_CHECK_LEVEL_STRICT) {
 }
 
 std::unique_ptr<WebstoreInstaller::Approval>
 WebstoreInstaller::Approval::CreateWithInstallPrompt(Profile* profile) {
   std::unique_ptr<Approval> result(new Approval());
   result->profile = profile;
   return result;
 }
 
@@ skipping 535 matching lines @@
         1,
         kMaxSizeKb,
         kNumBuckets);
   }
   UMA_HISTOGRAM_BOOLEAN(
       "Extensions.WebstoreDownload.InterruptTotalSizeUnknown",
       total_bytes <= 0);
 }
 
 }  // namespace extensions