Reviewed by Antti Koivisto.

        Part of WebCore should use CFNetwork-based loader on Mac
        https://bugs.webkit.org/show_bug.cgi?id=51836

        Fixes for warnings and other minor cleanups when we enable USE_CFNETWORK on Mac.

        * platform/network/cf/ResourceErrorCF.cpp:
        (WebCore::ResourceError::cfStreamError):
        * platform/network/cf/ResourceHandleCFNet.cpp:
        (WebCore::allowsAnyHTTPSCertificateHosts):
        (WebCore::clientCerts):
        (WebCore::willSendRequest):
        (WebCore::didReceiveResponse):
        (WebCore::didReceiveData):
        (WebCore::didSendBodyData):
        (WebCore::shouldUseCredentialStorageCallback):
        (WebCore::didFinishLoading):
        (WebCore::didFail):
        (WebCore::didReceiveChallenge):
        (WebCore::makeFinalRequest):
        (WebCore::ResourceHandle::willLoadFromCache):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@86416 268f45cc-cd09-0410-ab3c-d52691b4dbfc