Show "About panel" bubble on Windows.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
===================================================================
--- chrome/chrome_browser.gypi	(revision 85003)
+++ chrome/chrome_browser.gypi	(working copy)
@@ -2794,6 +2794,10 @@
         'browser/ui/omnibox/omnibox_view.h',
         'browser/ui/options/options_util.cc',
         'browser/ui/options/options_util.h',
+        'browser/ui/panels/about_panel_bubble.cc',
+        'browser/ui/panels/about_panel_bubble.h',
+        'browser/ui/panels/extension_panel_originator.cc',
+        'browser/ui/panels/extension_panel_originator.h',
         'browser/ui/panels/panel.cc',
         'browser/ui/panels/panel.h',
         'browser/ui/panels/panel_browser_frame_view.cc',
@@ -2806,6 +2810,7 @@
         'browser/ui/panels/panel_browser_view.h',
         'browser/ui/panels/panel_manager.cc',
         'browser/ui/panels/panel_manager.h',
+        'browser/ui/panels/panel_originator_delegate.h',
         'browser/ui/panels/panel_window_controller_cocoa.h',
         'browser/ui/panels/panel_window_controller_cocoa.mm',
         'browser/ui/profile_error_dialog.cc',
@@ -3672,6 +3677,8 @@
             'browser/power_save_blocker_stub.cc',
             'browser/ui/browser_list_stub.cc',
             'browser/ui/crypto_module_password_dialog_nss.cc',
+            'browser/ui/panels/about_panel_bubble.cc',
+            'browser/ui/panels/about_panel_bubble.h',
             'browser/ui/panels/panel_browser_frame_view.cc',
             'browser/ui/panels/panel_browser_frame_view.h',
             'browser/ui/panels/panel_browser_view.cc',
@@ -4270,6 +4277,8 @@
                 ['exclude', '^browser/ui/browser_list_stub.cc'],
                 ['exclude', '^browser/ui/views/autocomplete/autocomplete_popup_gtk.cc'],
                 ['exclude', '^browser/ui/views/autocomplete/autocomplete_popup_gtk.h'],
+                ['exclude', '^browser/ui/panels/about_panel_bubble.cc'],
+                ['exclude', '^browser/ui/panels/about_panel_bubble.h'],
                 ['exclude', '^browser/ui/panels/panel_browser_frame_view.cc'],
                 ['exclude', '^browser/ui/panels/panel_browser_frame_view.h'],
                 ['exclude', '^browser/ui/panels/panel_browser_view.cc'],