Make the notification builder more XPC friendly

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index df43b43c680036888f0e36441a42b1c73e7deb61..10ca5d4ac5bff64a8a19b1106e7b8de121e35371 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -2201,8 +2201,6 @@
       'browser/notifications/native_notification_display_service.h',
       'browser/notifications/notification.cc',
       'browser/notifications/notification.h',
-      'browser/notifications/notification_builder_mac.mm',
-      'browser/notifications/notification_builder_mac.h',
       'browser/notifications/notification_delegate.h',
       'browser/notifications/notification_display_service.h',
       'browser/notifications/notification_display_service_factory.cc',
@@ -3740,6 +3738,11 @@
                 '<@(chrome_browser_notifications_android_java_ui_sources)',
               ],
             }],
+            ['OS=="mac"', {
+              'dependencies' : [
+                'browser/ui/cocoa/notifications/notification_common.gyp:notification_common',
+              ],
+            }],
           ],
         }],
         ['enable_themes==1', {