Add IDL and initial Blink API for Background Sync

Source/modules/background_sync/SyncEvent.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef PushEvent_h
-#define PushEvent_h
+#ifndef SyncEvent_h
+#define SyncEvent_h
 
 #include "modules/EventModules.h"
-#include "modules/push_messaging/PushEventInit.h"
-#include "modules/push_messaging/PushMessageData.h"
+#include "modules/background_sync/SyncEventInit.h"
+#include "modules/background_sync/SyncRegistration.h"
 #include "modules/serviceworkers/ExtendableEvent.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class PushEvent final : public ExtendableEvent {
+class SyncEvent final : public ExtendableEvent {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<PushEvent> create()
+    static PassRefPtrWillBeRawPtr<SyncEvent> create()
     {
-        return adoptRefWillBeNoop(new PushEvent);
+        return adoptRefWillBeNoop(new SyncEvent);
     }
-    static PassRefPtrWillBeRawPtr<PushEvent> create(const AtomicString& type, PushMessageData* data, WaitUntilObserver* observer)
+    static PassRefPtrWillBeRawPtr<SyncEvent> create(const AtomicString& type, SyncRegistration* syncRegistration, WaitUntilObserver* observer)
     {
-        return adoptRefWillBeNoop(new PushEvent(type, data, observer));
+        return adoptRefWillBeNoop(new SyncEvent(type, syncRegistration, observer));
     }
-    static PassRefPtrWillBeRawPtr<PushEvent> create(const AtomicString& type, const PushEventInit& initializer)
+    static PassRefPtrWillBeRawPtr<SyncEvent> create(const AtomicString& type, const SyncEventInit& init)
     {
-        return adoptRefWillBeNoop(new PushEvent(type, initializer));
+        return adoptRefWillBeNoop(new SyncEvent(type, init));
     }
 
-    virtual ~PushEvent();
+    virtual ~SyncEvent();
 
     virtual const AtomicString& interfaceName() const override;
 
-    PushMessageData* data();
+    SyncRegistration* registration();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    PushEvent();
-    PushEvent(const AtomicString& type, PushMessageData*, WaitUntilObserver*);
-    PushEvent(const AtomicString& type, const PushEventInit&);
+    SyncEvent();
+    SyncEvent(const AtomicString& type, SyncRegistration*, WaitUntilObserver*);
+    SyncEvent(const AtomicString& type, const SyncEventInit&);
 
-    PersistentWillBeMember<PushMessageData> m_data;
+    PersistentWillBeMember<SyncRegistration> m_syncRegistration;
 };
 
 } // namespace blink
 
-#endif // PushEvent_h
+#endif // SyncEvent_h