Reviewed by Alp Toker.

        http://bugs.webkit.org/show_bug.cgi?id=16476

        Add libsoup HTTP backend.

        * GNUmakefile.am:
        * platform/network/ResourceHandleInternal.h:
        (WebCore::ResourceHandleInternal::ResourceHandleInternal):
        * platform/network/soup/AuthenticationChallenge.h: Added.
        (WebCore::AuthenticationChallenge::AuthenticationChallenge):
        * platform/network/soup/ResourceError.h: Added.
        (WebCore::ResourceError::ResourceError):
        * platform/network/soup/ResourceHandleSoup.cpp: Added.
        (WebCore::ResourceHandleInternal::~ResourceHandleInternal):
        (WebCore::ResourceHandle::~ResourceHandle):
        (WebCore::dataCallback):
        (WebCore::parseDataUrl):
        (WebCore::ResourceHandle::start):
        (WebCore::ResourceHandle::cancel):
        (WebCore::ResourceHandle::bufferedData):
        (WebCore::ResourceHandle::supportsBufferedData):
        (WebCore::ResourceHandle::setDefersLoading):
        (WebCore::ResourceHandle::loadsBlocked):
        (WebCore::ResourceHandle::willLoadFromCache):
        * platform/network/soup/ResourceRequest.h: Copied from WebCore/platform/network/curl/ResourceRequest.h.
        (WebCore::ResourceRequest::ResourceRequest):
        (WebCore::ResourceRequest::doUpdatePlatformRequest):
        * platform/network/soup/ResourceResponse.h: Added.
        (WebCore::ResourceResponse::ResourceResponse):
        (WebCore::ResourceResponse::setResponseFired):
        (WebCore::ResourceResponse::responseFired):
        (WebCore::ResourceResponse::doUpdateResourceResponse):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@30970 268f45cc-cd09-0410-ab3c-d52691b4dbfc