Reviewed by Eric.

        Bug 17971: [Curl] FormData processing should be moved to its own class

        Move FormData treatment into FormDataStream. The aim is to have FormDataStream behave like a stream that cURL
        could manipulate.

        First step into having complete file uploading facility in cURL.

        No test case as it is only code refactoring.

        * GNUmakefile.am: Add FormDataStreamCurl.cpp
        * platform/network/ResourceHandleInternal.h: Move code to FormStreamDataCurl.h
        (WebCore::ResourceHandleInternal::ResourceHandleInternal):
        * platform/network/curl/FormDataStreamCurl.cpp: Added.
        (WebCore::FormDataStream::~FormDataStream):
        (WebCore::FormDataStream::read):
        * platform/network/curl/FormDataStreamCurl.h: Added.
        (WebCore::FormDataStream::FormDataStream):
        * platform/network/curl/ResourceHandleCurl.cpp:
        (WebCore::ResourceHandleInternal::~ResourceHandleInternal):
        * platform/network/curl/ResourceHandleManager.cpp:
        (WebCore::readCallback): Move code to FormDataStreamCurl.cpp




git-svn-id: http://svn.webkit.org/repository/webkit/trunk@32956 268f45cc-cd09-0410-ab3c-d52691b4dbfc