Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

chrome/browser/ui/app_list/app_list_controller_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/ui/app_list/app_list_controller.h"
+#include "chrome/test/base/in_process_browser_test.h"
+
+// Browser Test for AppListController that runs on all platforms supporting
+// app_list.
+class AppListControllerBrowserTest : public InProcessBrowserTest {
+ public:
+  AppListControllerBrowserTest() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AppListControllerBrowserTest);
+};
+
+// Disabled on Windows. Investigating in http://crbug.com/168955 .
+#if defined(OS_WIN)
+#define MAYBE_ShowAndShutdown DISABLED_ShowAndShutdown
+#else
+#define MAYBE_ShowAndShutdown ShowAndShutdown
+#endif
+
+// Test showing the app list, followed by browser close.
+IN_PROC_BROWSER_TEST_F(AppListControllerBrowserTest, MAYBE_ShowAndShutdown) {
+  app_list_controller::ShowAppList();

[sail, 2013/01/09 22:09:53]

I think this should be a platform specific test. Then you could write something
like this:

AppListController controller;
controller.ShowAppList();
EXPECT_TRUE([controller.current_window() isVisible]);
controller.DismissView();
EXPECT_FALSE([controller.current_window() isVisible]);

[benwells, 2013/01/09 23:35:46]

It would be good to test that the window is visible, but we should be able to do
that in a platform independent way and get coverage on Windows as well.

Tests for the app list on windows are non-existent, and that is my fault. I've
logged http://crbug.com/169114 to track this. If it's OK with you I will expose
the necessary plumbing to test visibility and other basic stuff across platforms
after this patch is landed.

+}