Implement message center on Windows

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 2964c40f129cd988f8184d6e843aa90bd0926a1f..6225ee92bf7079727d23bdaf530ffcd92b53db63 100644
--- a/chrome/chrome_browser_ui.gypi
+++ b/chrome/chrome_browser_ui.gypi
@@ -1370,6 +1370,10 @@
         'browser/ui/views/avatar_menu_bubble_view.h',
         'browser/ui/views/avatar_menu_button.cc',
         'browser/ui/views/avatar_menu_button.h',
+        'browser/ui/views/balloon_collection_impl_win.cc',
+        'browser/ui/views/balloon_collection_impl_win.h',
+        'browser/ui/views/balloon_view_win.cc',
+        'browser/ui/views/balloon_view_win.h',
         'browser/ui/views/bookmarks/bookmark_bar_instructions_view.cc',
         'browser/ui/views/bookmarks/bookmark_bar_instructions_view.h',
         'browser/ui/views/bookmarks/bookmark_bar_view.cc',
@@ -1624,6 +1628,8 @@
         'browser/ui/views/login_prompt_views.cc',
         'browser/ui/views/login_view.cc',
         'browser/ui/views/login_view.h',
+        'browser/ui/views/message_center/message_center_tray_host_win.h',
+        'browser/ui/views/message_center/message_center_tray_host_win.cc',
         'browser/ui/views/native_constrained_window_aura.cc',
         'browser/ui/views/native_constrained_window_win.cc',
         'browser/ui/views/notifications/balloon_collection_views.cc',
@@ -2360,6 +2366,11 @@
             '../ash/ash_strings.gyp:ash_strings',
           ],
         }],
+        ['use_ash==1 or OS=="win"', {
+          'dependencies': [
+            '../ui/message_center/message_center.gyp:message_center',
+          ],
+        }],
         ['use_aura==1 and use_ash==0 and OS=="linux"', {
           'dependencies': [
             # gtk2 is the only component that can interact with gtk2 in our new