Move FileEnumerator to its own file, do some refactoring.

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 2013 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/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/string16.h"
@@ skipping 1321 matching lines @@
     DictionaryPrefUpdate update(profile_->GetPrefs(), "extensions.settings");
     DictionaryValue* dict = update.Get();
     ASSERT_TRUE(dict != NULL);
     dict->Remove("behllobkkfkfnphdnhnkndlbkcpglgmj", NULL);
   }
 
   service_->Init();
   // Wait for GarbageCollectExtensions task to complete.
   loop_.RunUntilIdle();
 
-  file_util::FileEnumerator dirs(extensions_install_dir_, false,
-                                 file_util::FileEnumerator::DIRECTORIES);
+  base::FileEnumerator dirs(extensions_install_dir_, false,
+                            base::FileEnumerator::DIRECTORIES);
   size_t count = 0;
   while (!dirs.Next().empty())
     count++;
 
   // We should have only gotten two extensions now.
   EXPECT_EQ(2u, count);
 
   // And extension1 dir should now be toast.
   base::FilePath extension_dir = extensions_install_dir_
       .AppendASCII("behllobkkfkfnphdnhnkndlbkcpglgmj");
@@ skipping 4650 matching lines @@
       new MockExtensionProvider(service_, Manifest::EXTERNAL_PREF);
   AddMockExternalProvider(provider);
   provider->UpdateOrAddExtension(updates_from_webstore, "1", crx_path);
 
   service_->CheckForExternalUpdates();
   loop_.RunUntilIdle();
   EXPECT_TRUE(extensions::HasExternalInstallError(service_));
   EXPECT_FALSE(extensions::HasExternalInstallBubble(service_));
   EXPECT_FALSE(service_->IsExtensionEnabled(updates_from_webstore));
 }