Move extension_test_message_listener to extensions.

chrome/browser/apps/app_crash_browsertest.cc

 // Copyright 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/apps/app_browsertest_util.h"
-#include "chrome/browser/extensions/extension_test_message_listener.h"
+#include "extensions/test/extension_test_message_listener.h"
 
 // This class of BrowserTests is a helper to create tests related to crashes in
 // Chrome Apps. To be tested, the app will have to be placed as any other test
 // app (see PlatformAppBrowserTest) and will need to send a "Done" message back.
 // When the "Done" message is received, the test succeed. If it is not, it is
 // assumed that Chrome has crashed and the test will anyway fail.
 //
 // The entry in this file should be something like:
 // IN_PROC_BROWSER_TEST_F(AppCrashTest, <TEST_NAME>) {
 //   ASSERT_TRUE(RunAppCrashTest("<DIRECTORY_TEST_NAME>"));
 // }
 
 class AppCrashTest : public extensions::PlatformAppBrowserTest {
 public:
  void RunAppCrashTest(const char* name) {
    LoadAndLaunchPlatformApp(name, "Done");
   }
 };
 
 IN_PROC_BROWSER_TEST_F(AppCrashTest, HiddenWindows) {
   RunAppCrashTest("crashtest_hidden_windows");
 }