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

chrome/chrome_browser_ui.gypi

Index: chrome/chrome_browser_ui.gypi
diff --git a/chrome/chrome_browser_ui.gypi b/chrome/chrome_browser_ui.gypi
index 2d326957fefba8c18cd2c0390d505a9d12921d54..c00aca75966a5efadb4cc68eaff1096b6b6d8640 100644
--- a/chrome/chrome_browser_ui.gypi
+++ b/chrome/chrome_browser_ui.gypi
@@ -2303,6 +2303,14 @@
       'browser/ui/views/website_settings/website_settings_popup_view.cc',
       'browser/ui/views/website_settings/website_settings_popup_view.h',
     ],
+    # MacViews sources that we still want to keep behind a compile-time flag.
+    # TODO(jackhou): Move items to chrome_browser_ui_views_sources when they
+    # migrate from mac_views_browser to a chrome://flag.
+    'chrome_browser_ui_views_mac_sources': [

[tapted, 2015/03/04 04:13:34]

this name isn't quite right - I'd save `chrome_browser_ui_views_mac_sources` for
things we need only on mac to support the default build, rather than the build
behind a compile time flag. I guess there's nothing in there yet [ :o ]. Note
that that class of files might be achievable with _mac or .mm suffixes, but I
think GN wants to move away from that somewhat.

Maybe chrome_browser_ui_views_mac_experimental_sources ?

[jackhou1, 2015/03/04 04:37:13]

Done.

+      'browser/ui/views/apps/chrome_app_window_client_views_mac.mm',
+      'browser/ui/views/apps/chrome_native_app_window_views_mac.h',
+      'browser/ui/views/apps/chrome_native_app_window_views_mac.mm',
+    ],
     # Windows-only. Assume ash/aura/views.
     'chrome_browser_ui_win_sources': [
       'browser/ui/network_profile_bubble.cc',
@@ -2851,9 +2859,7 @@
             ['OS=="mac"', {
               'conditions': [
                 ['mac_views_browser==1', {
-                  'sources': [
-                    'browser/ui/views/apps/chrome_app_window_client_views_mac.mm',
-                  ],
+                  'sources': [ '<@(chrome_browser_ui_views_mac_sources)' ],
                   'sources!': [
                     'browser/ui/cocoa/apps/chrome_app_window_client_cocoa.mm',
                     'browser/ui/cocoa/bookmarks/bookmark_drag_drop_cocoa.mm',