https://bugs.webkit.org/show_bug.cgi?id=120654

Reviewed by Simon Fraser.

Source/JavaScriptCore:

Make xcode copy the required headers, and add appropriate export attributes

* JavaScriptCore.xcodeproj/project.pbxproj:
* runtime/JSMap.h:
* runtime/JSSet.h:
* runtime/MapData.h:

Source/WebCore:

Add support for cloning Map and Set.  Fairly self explanatory change.
Needed to add Forwarding headers for the JSMap, JSSet and MapData classes.

* ForwardingHeaders/runtime/JSMap.h: Added.
* ForwardingHeaders/runtime/JSSet.h: Added.
* ForwardingHeaders/runtime/MapData.h: Added.
* bindings/js/SerializedScriptValue.cpp:
(WebCore::CloneSerializer::isMap):
(WebCore::CloneSerializer::isSet):
(WebCore::CloneSerializer::startSet):
(WebCore::CloneSerializer::startMap):
(WebCore::CloneSerializer::serialize):
(WebCore::CloneDeserializer::consumeMapDataTerminationIfPossible):
(WebCore::CloneDeserializer::deserialize):

LayoutTests:

Tests!

* fast/dom/Window/script-tests/postmessage-clone.js:
(set new):
(set add.set add):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155008 268f45cc-cd09-0410-ab3c-d52691b4dbfc