Move Extension into extensions namespace

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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 28 matching lines @@
 #include "net/base/escape.h"
 
 using content::BrowserThread;
 using content::DownloadId;
 using content::DownloadItem;
 using content::NavigationController;
 using content::DownloadUrlParameters;
 
 namespace {
 
+using extensions::Extension;
+
 // Key used to attach the Approval to the DownloadItem.
 const char kApprovalKey[] = "extensions.webstore_installer";
 
 const char kInvalidIdError[] = "Invalid id";
 const char kNoBrowserError[] = "No browser found";
 const char kDownloadDirectoryError[] = "Could not create download directory";
 const char kDownloadCanceledError[] = "Download canceled";
 const char kInstallCanceledError[] = "Install canceled";
 const char kDownloadInterruptedError[] = "Download interrupted";
 const char kInvalidDownloadError[] = "Download was not a CRX";
@@ skipping 273 matching lines @@
 }
 
 void WebstoreInstaller::ReportSuccess() {
   if (delegate_) {
     delegate_->OnExtensionInstallSuccess(id_);
     delegate_ = NULL;
   }
 
   Release();  // Balanced in Start().
 }