Redo r144538 (after r144530).

* WebCoreSupport/WebFrameNetworkingContext.cpp:
* WebCoreSupport/WebFrameNetworkingContext.h:
* WebCoreSupport/WebPlatformStrategies.cpp:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144540 268f45cc-cd09-0410-ab3c-d52691b4dbfc