Add the data attribute to the Notification object

Source/bindings/modules/v8/custom/V8NotificationCustom.cpp

Index: Source/bindings/modules/v8/custom/V8NotificationCustom.cpp
diff --git a/Source/bindings/modules/v8/custom/V8NotificationCustom.cpp b/Source/bindings/modules/v8/custom/V8NotificationCustom.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..9c109cc7a0e09db97832d95c0bb8a8a503c47bf8
--- /dev/null
+++ b/Source/bindings/modules/v8/custom/V8NotificationCustom.cpp
@@ -0,0 +1,27 @@
+// 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.
+
+#include "config.h"
+#include "bindings/modules/v8/V8Notification.h"
+
+#include "bindings/core/v8/SerializedScriptValue.h"
+#include "modules/notifications/Notification.h"
+
+namespace blink {
+
+void V8Notification::dataAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Local<v8::Object> holder = info.Holder();
+    Notification* impl = V8Notification::toImpl(holder);
+    v8::Handle<v8::Value> result;
+
+    if (impl->data())
+        result = impl->data()->deserialize(info.GetIsolate());
+    else
+        result = v8::Null(info.GetIsolate());
+
+    v8SetReturnValue(info, result);

[Peter Beverloo, 2015/03/10 23:34:26]

I'm not too familiar with custom bindings, but as a preliminary look over this
code, I think we can simplify this a bit by writing it as follows:

=========================
v8::Local<v8::Object> holder = info.Holder();
Notification* impl = V8Notification::toImpl(holder);

if (!impl->data()) {
    v8SetReturnValueNull(info);
    return;
}

v8SetReturnValue(info, impl->data()->deserialize(info.GetIsolate()));
=========================

[Sanghyun Park, 2015/03/11 10:59:52]

Your suggestion codes are more clean than this.
I'll fix this.

+}
+
+}

[Peter Beverloo, 2015/03/10 23:34:26]

micro nit: // namespace blink

[Sanghyun Park, 2015/03/11 10:59:51]

Done.