Move extension_test_message_listener to extensions.

chrome/browser/extensions/activity_log/ad_injection_browsertest.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/scoped_observer.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/activity_log/activity_actions.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
 #include "chrome/browser/extensions/activity_log/ad_network_database.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
-#include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "extensions/common/extension.h"
+#include "extensions/test/extension_test_message_listener.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_response.h"
 #include "url/gurl.h"
 
 namespace net {
 namespace test_server {
 struct HttpRequest;
 }
 }
 
@@ skipping 353 matching lines @@
     listener()->Reply("Continue");
     listener()->Reset();
   }
 }
 
 // TODO(rdevlin.cronin): We test a good amount of ways of injecting ads with
 // the above test, but more is better in testing.
 // See crbug.com/357204.
 
 }  // namespace extensions