Move extension_test_message_listener to extensions.

chrome/browser/extensions/extension_webui_apitest.cc

 // Copyright 2014 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/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_apitest.h"
-#include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/common/api/test.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/switches.h"
+#include "extensions/test/extension_test_message_listener.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
 namespace OnMessage = core_api::test::OnMessage;
 
 namespace {
 
 void FindFrame(const GURL& url,
                content::RenderFrameHost** out,
@@ skipping 204 matching lines @@
 
   ASSERT_TRUE(listener->WaitUntilSatisfied());
   listener->Reply(extension->id());
   listener.reset(new ExtensionTestMessageListener("onclose received", false));
   ASSERT_TRUE(listener->WaitUntilSatisfied());
 }
 
 }  // namespace
 
 }  // namespace extensions