Push API: define push event on Service Worker.

Source/modules/modules.gypi

Index: Source/modules/modules.gypi
diff --git a/Source/modules/modules.gypi b/Source/modules/modules.gypi
index e08b7e580acd281664ef409802c8975e8ecc34e1..d26991645ccbbcac7c664ac0932d57c31a5e164e 100644
--- a/Source/modules/modules.gypi
+++ b/Source/modules/modules.gypi
@@ -103,6 +103,7 @@
       'notifications/Notification.idl',
       'notifications/NotificationPermissionCallback.idl',
       'performance/WorkerPerformance.idl',
+      'push_messaging/PushEvent.idl',
       'push_messaging/PushManager.idl',
       'push_messaging/PushRegistration.idl',
       'quota/DeprecatedStorageInfo.idl',
@@ -217,6 +218,7 @@
       'performance/SharedWorkerPerformance.idl',
       'performance/WorkerGlobalScopePerformance.idl',
       'push_messaging/NavigatorPushManager.idl',
+      'push_messaging/ServiceWorkerGlobalScopePush.idl',
       'quota/NavigatorStorageQuota.idl',
       'quota/WindowQuota.idl',
       'quota/WorkerNavigatorStorageQuota.idl',
@@ -244,6 +246,7 @@
       'mediastream/RTCDTMFToneChangeEvent.idl',
       'mediastream/RTCDataChannelEvent.idl',
       'mediastream/RTCIceCandidateEvent.idl',
+      'push_messaging/PushEvent.idl',
       'serviceworkers/FetchEvent.idl',
       'serviceworkers/InstallEvent.idl',
       'serviceworkers/InstallPhaseEvent.idl',
@@ -579,10 +582,13 @@
       'push_messaging/PushController.h',
       'push_messaging/PushError.cpp',
       'push_messaging/PushError.h',
+      'push_messaging/PushEvent.cpp',
+      'push_messaging/PushEvent.h',
       'push_messaging/PushManager.cpp',
       'push_messaging/PushManager.h',
       'push_messaging/PushRegistration.cpp',
       'push_messaging/PushRegistration.h',
+      'push_messaging/ServiceWorkerGlobalScopePush.h',
       'quota/DOMWindowQuota.cpp',
       'quota/DOMWindowQuota.h',
       'quota/DeprecatedStorageInfo.cpp',