Move extension_test_message_listener to extensions.

chrome/browser/extensions/shared_module_apitest.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_apitest.h"
-#include "chrome/browser/extensions/extension_test_message_listener.h"
+#include "extensions/test/extension_test_message_listener.h"
 
 using extensions::Extension;
 
 // NB: We use LoadExtension instead of InstallExtension for shared modules so
 // the public-keys in their manifests are used to generate the extension ID, so
 // it can be imported correctly.  We use InstallExtension otherwise so the loads
 // happen through the CRX installer which validates imports.
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, SharedModule) {
   // import_pass depends on this shared module.
@@ skipping 30 matching lines @@
       test_data_dir_.AppendASCII("shared_module").AppendASCII("import_pass"),
       1));
 
   EXPECT_TRUE(listener1.WaitUntilSatisfied());
 
   ExtensionTestMessageListener listener2("shared_module_updated", false);
   ReloadExtension(extension->id());
 
   EXPECT_TRUE(listener2.WaitUntilSatisfied());
 }