Move Extension into extensions namespace

chrome/browser/sync/glue/theme_util_unittest.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/sync/glue/theme_util.h"
 
 #include "base/file_path.h"
 #include "base/values.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/test/base/testing_profile.h"
 #include "sync/protocol/theme_specifics.pb.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using extensions::Extension;
+
 namespace browser_sync {
 
 namespace {
 
 using ::testing::AnyNumber;
 using ::testing::Return;
 
 class MockThemeService : public ThemeService {
  public:
   MOCK_METHOD0(SetNativeTheme, void());
@@ skipping 203 matching lines @@
   // TODO(akalin): Mock out call to GetPrefs() under TOOLKIT_GTK.
 
   sync_pb::ThemeSpecifics theme_specifics;
   SetCurrentThemeFromThemeSpecificsIfNecessary(theme_specifics,
                                                &profile);
 }
 
 }  // namespace
 
 }  // namespace browser_sync