Add a private API method to install a webstore app from Files.app

chrome/browser/chromeos/extensions/file_manager/file_browser_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/chromeos/extensions/file_manager/file_browser_private_api.h"
 
 #include "chrome/browser/chromeos/extensions/file_manager/event_router.h"
 #include "chrome/browser/chromeos/extensions/file_manager/file_browser_private_api_factory.h"
 #include "chrome/browser/chromeos/extensions/file_manager/private_api_dialog.h"
 #include "chrome/browser/chromeos/extensions/file_manager/private_api_drive.h"
@@ skipping 49 matching lines @@
   registry->RegisterFunction<SetLastModifiedFunction>();
   registry->RegisterFunction<GetSizeStatsFunction>();
   registry->RegisterFunction<GetVolumeMetadataFunction>();
   registry->RegisterFunction<ValidatePathNameLengthFunction>();
   registry->RegisterFunction<FormatDeviceFunction>();
 
   // Miscellaneous functions.
   registry->RegisterFunction<LogoutUserFunction>();
   registry->RegisterFunction<GetPreferencesFunction>();
   registry->RegisterFunction<SetPreferencesFunction>();
+  registry->RegisterFunction<InstallWebstoreItemFunction>();
   registry->RegisterFunction<ZipSelectionFunction>();
   registry->RegisterFunction<ZoomFunction>();
+
   event_router_->ObserveFileSystemEvents();
 }
 
 FileBrowserPrivateAPI::~FileBrowserPrivateAPI() {
 }
 
 void FileBrowserPrivateAPI::Shutdown() {
   event_router_->Shutdown();
 }
 
 // static
 FileBrowserPrivateAPI* FileBrowserPrivateAPI::Get(Profile* profile) {
   return FileBrowserPrivateAPIFactory::GetForProfile(profile);
 }
 
 }  // namespace file_manager