Move ExtensionSystem into extensions namespace

chrome/browser/extensions/installed_loader.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/installed_loader.h"
 
 #include "base/file_path.h"
 #include "base/metrics/histogram.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 75 matching lines @@
   if (extension &&
       extension->location() != Extension::LOAD &&
       info.extension_id != extension->id()) {
     error = errors::kCannotChangeExtensionID;
     extension = NULL;
     content::RecordAction(UserMetricsAction("Extensions.IDChangedError"));
   }
 
   // Check policy on every load in case an extension was blacklisted while
   // Chrome was not running.
-  const ManagementPolicy* policy = ExtensionSystem::Get(
+  const ManagementPolicy* policy = extensions::ExtensionSystem::Get(
       extension_service_->profile())->management_policy();
   if (extension &&
       !policy->UserMayLoad(extension, NULL)) {
     // The error message from UserMayInstall() often contains the extension ID
     // and is therefore not well suited to this UI.
     error = errors::kDisabledByPolicy;
     extension = NULL;
   }
 
   if (!extension) {
@@ skipping 195 matching lines @@
   if (extension_prefs_->AllowFileAccess(info->extension_id))
     flags |= Extension::ALLOW_FILE_ACCESS;
   if (extension_prefs_->IsFromWebStore(info->extension_id))
     flags |= Extension::FROM_WEBSTORE;
   if (extension_prefs_->IsFromBookmark(info->extension_id))
     flags |= Extension::FROM_BOOKMARK;
   return flags;
 }
 
 }  // namespace extensions