Split ExtensionTestObserver and move to //extensions.

chrome/browser/apps/app_window_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 "build/build_config.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/extensions/app_launch_params.h"
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/app_window/app_window_geometry_cache.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/test/extension_test_message_listener.h"
 #include "extensions/test/result_catcher.h"
 
 using extensions::AppWindowGeometryCache;
 using extensions::ResultCatcher;
 
@@ skipping 235 matching lines @@
 IN_PROC_BROWSER_TEST_F(AppWindowAPITest, TestFrameColors) {
   ASSERT_TRUE(RunAppWindowAPITest("testFrameColors")) << message_;
 }
 #endif
 
 IN_PROC_BROWSER_TEST_F(AppWindowAPITest, TestVisibleOnAllWorkspaces) {
   ASSERT_TRUE(
       RunAppWindowAPITestAndWaitForRoundTrip("testVisibleOnAllWorkspaces"))
       << message_;
 }