Improve the declared IDL type for postMessage()'s transferables

Source/core/dom/MessagePort.idl

Index: Source/core/dom/MessagePort.idl
diff --git a/Source/core/dom/MessagePort.idl b/Source/core/dom/MessagePort.idl
index f834df6318afd25ddd80c9b681bf9d5f281c4ab7..e993eb048843f24c8e1d3f9b208c37f7448f20db 100644
--- a/Source/core/dom/MessagePort.idl
+++ b/Source/core/dom/MessagePort.idl
@@ -29,7 +29,8 @@
     ActiveDOMObject,
     WillBeGarbageCollected
 ] interface MessagePort : EventTarget {
-    [Custom, RaisesException] void postMessage(any message, optional MessagePort[] messagePorts);
+

[jsbell, 2014/07/16 16:48:08]

Nit: remove this whitespace?

(Could just be a glitch in the review tool)

[sof, 2014/07/16 18:19:15]

It's real, but unintentional. Removed now.

+    [Custom, RaisesException] void postMessage(any message, optional Transferable[] transfer);

[jsbell, 2014/07/16 16:48:08]

It appears to be sequence<Transferable> in specs rather than Transferable[].

[sof, 2014/07/16 18:19:15]

Yes, that it is. Let's mirror that; supported by extractTransferables() after
all.

 
     void start();
     void close();
@@ -37,4 +38,3 @@
     // event handler attributes
     attribute EventHandler onmessage;
 };
-