https://bugs.webkit.org/show_bug.cgi?id=31690
        Make SocketStreamHandleCFNet work on Windows

        * WebCore.vcproj/WebCore.vcproj: Added LoaderRunLoopCF.

        * platform/network/ResourceHandle.h: Removed loaderRunLoop().

        * platform/network/cf/LoaderRunLoopCF.cpp: Added.
        (WebCore::emptyPerform):
        (WebCore::runLoaderThread):
        (WebCore::loaderRunLoop):
        * platform/network/cf/LoaderRunLoopCF.h: Added.
        Moved the run loop that we use for CFNetwork from ResourceHandle to its own file, because
        it's needed for more than just resource loading.

        * platform/network/cf/ResourceHandleCFNet.cpp: Use loaderRunLoop() from its new location.

        * platform/network/cf/DNSCFNet.cpp: (WebCore::DNSResolveQueue::resolve): Ditto.

        * platform/network/cf/SocketStreamHandle.h: Added static callbacks for forwarding events to
        main thread.
        * platform/network/cf/SocketStreamHandleCFNet.cpp:
        (WebCore::SocketStreamHandle::SocketStreamHandle): Use loaderRunLoop() on Windows instead of
        inoperable main run loop.

        (WebCore::MainThreadEventCallbackInfo::MainThreadEventCallbackInfo): 
        (WebCore::SocketStreamHandle::readStreamCallback):
        (WebCore::SocketStreamHandle::writeStreamCallback):
        (WebCore::SocketStreamHandle::readStreamCallbackMainThread):
        (WebCore::SocketStreamHandle::writeStreamCallbackMainThread):
        Forward stream events to main thread on Windows.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51222 268f45cc-cd09-0410-ab3c-d52691b4dbfc