Reviewed by Timothy.

        Convert JavaScript objects to appropriate AppleScript types, instead of only strings
        http://bugzilla.opendarwin.org/show_bug.cgi?id=7012

WebKit:
        * WebView/WebView.m:
        (-[WebView aeDescByEvaluatingJavaScriptFromString:]): Added.
        * WebView/WebViewPrivate.h:

WebCore:
        * bridge/mac/WebCoreFrameBridge.h:
        * bridge/mac/WebCoreFrameBridge.mm:
        (aeDescFromJSValue): Added.
        (-[WebCoreFrameBridge aeDescByEvaluatingJavaScriptFromString:]): Added.

WebKitTools:
        * DumpRenderTree/AppleScriptController.h: Added.
        * DumpRenderTree/AppleScriptController.m: Added.
        * DumpRenderTree/DumpRenderTree.m:
        (-[WaitUntilDoneDelegate webView:windowScriptObjectAvailable:]):
        * DumpRenderTree/DumpRenderTree.xcodeproj/project.pbxproj:

LayoutTests:
        * fast/AppleScript: Added.
        * fast/AppleScript/001-expected.txt: Added.
        * fast/AppleScript/001.html: Added.
        * fast/AppleScript/array-expected.txt: Added.
        * fast/AppleScript/array.html: Added.
        * fast/AppleScript/date-expected.txt: Added.
        * fast/AppleScript/date.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@12644 268f45cc-cd09-0410-ab3c-d52691b4dbfc