Introduce the PushSubscription.curve25519dh attribute (3/3)

Source/modules/push_messaging/PushSubscription.h

Index: Source/modules/push_messaging/PushSubscription.h
diff --git a/Source/modules/push_messaging/PushSubscription.h b/Source/modules/push_messaging/PushSubscription.h
index e5a6305cfdc9dc9c89d8b4aacf7e4e15f4e10a83..d9de3ea76c7eb18de5fde3afbf689678bf875268 100644
--- a/Source/modules/push_messaging/PushSubscription.h
+++ b/Source/modules/push_messaging/PushSubscription.h
@@ -8,8 +8,11 @@
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMArrayBuffer.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
@@ -27,6 +30,8 @@ public:
     virtual ~PushSubscription();
 
     KURL endpoint() const;
+    PassRefPtr<DOMArrayBuffer> curve25519dh() const;
+
     ScriptPromise unsubscribe(ScriptState*);
 
     ScriptValue toJSONForBinding(ScriptState*);
@@ -34,9 +39,11 @@ public:
     DECLARE_TRACE();
 
 private:
-    PushSubscription(const KURL& endpoint, ServiceWorkerRegistration*);
+    PushSubscription(const WebPushSubscription&, ServiceWorkerRegistration*);
 
     KURL m_endpoint;
+    RefPtr<DOMArrayBuffer> m_curve25519dh;
+
     Member<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };