Blink side of exposing the service worker registration associated with geofencing API calls.

Source/modules/serviceworkers/ServiceWorkerRegistration.h

Index: Source/modules/serviceworkers/ServiceWorkerRegistration.h
diff --git a/Source/modules/serviceworkers/ServiceWorkerRegistration.h b/Source/modules/serviceworkers/ServiceWorkerRegistration.h
index 95bc48293d3982ea14dc7eee0dc1bd1f73b73456..56a7badfaa9f8cbe2928fb33c7c3e29813182a2a 100644
--- a/Source/modules/serviceworkers/ServiceWorkerRegistration.h
+++ b/Source/modules/serviceworkers/ServiceWorkerRegistration.h
@@ -8,6 +8,7 @@
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventTarget.h"
 #include "modules/serviceworkers/ServiceWorker.h"
+#include "platform/Supplementable.h"
 #include "public/platform/WebServiceWorkerRegistration.h"
 #include "public/platform/WebServiceWorkerRegistrationProxy.h"
 #include "wtf/OwnPtr.h"
@@ -26,7 +27,8 @@ class ServiceWorkerRegistration FINAL
     : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<ServiceWorkerRegistration>
     , public ActiveDOMObject
     , public EventTargetWithInlineData
-    , public WebServiceWorkerRegistrationProxy {
+    , public WebServiceWorkerRegistrationProxy
+    , public HeapSupplementable<ServiceWorkerRegistration> {

[michaeln, 2014/10/12 23:51:02]

Can you briefly explain what this voodoo means and why its needed? Did something
about this CL require its addition? Thnx.

Oh, because this CL extends the api available on registration objects!

[Marijn Kruisselbrink, 2014/10/13 19:09:59]

Yes. For other modules to be able to extend ServiceWorkerRegistration, it needs
to implement HeapSupplementable (just like Navigator already did).

     DEFINE_WRAPPERTYPEINFO();
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<ServiceWorkerRegistration>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ServiceWorkerRegistration);
@@ -53,6 +55,8 @@ public:
 
     String scope() const;
 
+    WebServiceWorkerRegistration* webRegistration() { return m_outerRegistration.get(); }
+
     ScriptPromise unregister(ScriptState*);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(updatefound);