Reviewed by Maciej.

    Reviewed by Maciej.

        - added WebFrameLoaderClient protocol -- to be used to make WebFrameLoader forget all about WebFrame

        * Loader/WebDocumentLoadState.h: Added comment about Maciej's planned renaming here.
        * Loader/WebFrameLoader.h:
        * Loader/WebFrameLoader.m: Renamed webFrame to client and added the new protocol.
        Eventually we'll be removing the dependency on WebFrame entirely.
        * WebView/WebFrame.m: (-[WebFrame _initWithWebFrameView:webView:bridge:]): Update to call the method
        by its new name.

        * Loader/WebFrameLoaderClient.h: Added.
        * WebKit.xcodeproj/project.pbxproj: Updated for new file, sorted things.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16861 268f45cc-cd09-0410-ab3c-d52691b4dbfc