[webnfc] Align NFC interface with latest specification.

third_party/WebKit/Source/modules/nfc/MessageCallback.h

Index: third_party/WebKit/Source/modules/nfc/MessageCallback.h
diff --git a/third_party/WebKit/Source/modules/nfc/MessageCallback.h b/third_party/WebKit/Source/modules/nfc/MessageCallback.h
new file mode 100644
index 0000000000000000000000000000000000000000..0c6060f6e44a0c76d17f3a1f7abc5f15d97e9c24
--- /dev/null
+++ b/third_party/WebKit/Source/modules/nfc/MessageCallback.h
@@ -0,0 +1,22 @@
+// 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 MessageCallback_h
+#define MessageCallback_h
+
+#include "modules/nfc/NFCMessage.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class MessageCallback : public GarbageCollectedFinalized<MessageCallback> {
+public:
+    MessageCallback() { }

[riju_, 2015/11/17 08:52:32]

If you inherit from GarbageCollectedFinalized, a virtual destructor is needed.

[shalamov, 2015/11/17 09:04:54]

Done.

+    DEFINE_INLINE_VIRTUAL_TRACE() { }
+    virtual void handleMessage(NFCMessage) = 0;

[riju_, 2015/11/16 15:05:01]

const NFCMessage& ?

[shalamov, 2015/11/17 08:21:18]

That would require spec change. NFCMessage would need to be interface. I will
talk to Kenneth, Zoltan.

+};
+
+} // namespace blink
+
+#endif // MessageCallback_h