Move Extension into extensions namespace

chrome/browser/extensions/external_extension_provider_impl.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/external_extension_provider_impl.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 22 matching lines @@
 
 #if !defined(OS_CHROMEOS)
 #include "chrome/browser/extensions/default_apps.h"
 #endif
 
 #if defined(OS_WIN)
 #include "chrome/browser/extensions/external_registry_extension_loader_win.h"
 #endif
 
 using content::BrowserThread;
+using extensions::Extension;
 
 // Constants for keeping track of extension preferences in a dictionary.
 const char ExternalExtensionProviderImpl::kExternalCrx[] = "external_crx";
 const char ExternalExtensionProviderImpl::kExternalVersion[] =
     "external_version";
 const char ExternalExtensionProviderImpl::kExternalUpdateUrl[] =
     "external_update_url";
 const char ExternalExtensionProviderImpl::kSupportedLocales[] =
     "supported_locales";
 const char ExternalExtensionProviderImpl::kIsBookmarkApp[] =
@@ skipping 351 matching lines @@
         linked_ptr<ExternalExtensionProviderInterface>(
           new ExternalExtensionProviderImpl(
               service,
               connector->GetAppPackUpdater()->CreateExternalExtensionLoader(),
               Extension::EXTERNAL_PREF,
               Extension::INVALID,
               Extension::NO_FLAGS)));
   }
 #endif
 }