[MacViews] Add NativeAppWindowViewsMac and port HideWithApp behavior from NativeAppWindowCocoa.

chrome/browser/ui/BUILD.gn

 # 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.
 
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("../../chrome_browser_ui.gypi") ],
@@ skipping 210 matching lines @@
                            "//chrome")
     deps += [ "//components/constrained_window" ]
     if (!is_chromeos) {
       sources +=
           rebase_path(gypi_values.chrome_browser_ui_views_non_chromeos_sources,
                       ".",
                       "//chrome")
     }
     if (is_mac) {
       if (mac_views_browser) {
-        sources += [ "views/apps/chrome_app_window_client_views_mac.mm" ]
+        sources += rebase_path(
+                gypi_values.chrome_browser_ui_views_mac_experimental_sources,
+                ".",
+                "//chrome")
         sources -= [
           "cocoa/apps/chrome_app_window_client_cocoa.mm",
           "cocoa/bookmarks/bookmark_drag_drop_cocoa.mm",
           "cocoa/browser_window_factory_cocoa.mm",
           "cocoa/tab_dialogs_cocoa.mm",
         ]
         deps += [ "//extensions/components/native_app_window" ]
       } else {
         sources -= [
           "views/apps/chrome_native_app_window_views.cc",
@@ skipping 287 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }