Implement gallery install API

chrome/browser/download/download_util.cc

 // Copyright (c) 2010 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.
 //
 // Download utility implementation
 
 #include "chrome/browser/download/download_util.h"
 
 #if defined(OS_WIN)
 #include <shobjidl.h>
@@ skipping 277 matching lines @@
                                    download_item.url());
     } else {
       bool is_gallery_download = ExtensionsService::IsDownloadFromGallery(
           download_item.url(), download_item.referrer_url());
       installer->set_original_mime_type(download_item.original_mime_type());
       installer->set_apps_require_extension_mime_type(true);
       installer->set_allow_privilege_increase(true);
       installer->set_original_url(download_item.url());
       installer->set_limit_web_extent_to_download_host(!is_gallery_download);
       installer->InstallCrx(download_item.full_path());
+      installer->set_allow_silent_install(is_gallery_download);
     }
   } else {
     TabContents* contents = NULL;
     // Get last active normal browser of profile.
     Browser* last_active =
         BrowserList::FindBrowserWithType(profile, Browser::TYPE_NORMAL, true);
     if (last_active)
       contents = last_active->GetSelectedTabContents();
     if (contents) {
       contents->AddInfoBar(
@@ skipping 451 matching lines @@
 }
 
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
   FilePath::StringType file_name;
   SStringPrintf(&file_name, PRFilePathLiteral FILE_PATH_LITERAL(".crdownload"),
                 suggested_path.value().c_str());
   return FilePath(file_name);
 }
 
 }  // namespace download_util