Move extension_test_message_listener to extensions.

extensions/browser/api/app_window/app_window_apitest.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 "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
-#include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/extensions/features/feature_channel.h"
 #include "chrome/test/base/testing_profile.h"
 #include "extensions/browser/app_window/app_window.h"
 #include "extensions/browser/app_window/app_window_registry.h"
 #include "extensions/browser/app_window/native_app_window.h"
+#include "extensions/test/extension_test_message_listener.h"
 #include "ui/base/base_window.h"
 #include "ui/gfx/rect.h"
 
 #if defined(OS_WIN)
 #include "ui/base/win/shell.h"
 #endif
 
 namespace extensions {
 
 namespace {
@@ skipping 137 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest,
                        WindowsApiVisibleOnAllWorkspacesInStable) {
   extensions::ScopedCurrentChannel channel(chrome::VersionInfo::CHANNEL_STABLE);
   EXPECT_TRUE(RunPlatformAppTest(
       "platform_apps/windows_api_visible_on_all_workspaces/in_stable"))
       << message_;
 }
 
 }  // namespace extensions