Reviewed by Brady.

    Reviewed by Brady.

        - move WebFrame code that creates WebDataSources down to WebFrameLoader, in preparation
        for WebFrameLoader just holding on to WebDocumentLoadState

        * Loader/WebFrameLoader.h:
        * Loader/WebFrameLoader.m:
        (-[WebFrameLoader _loadRequest:archive:]):
        (-[WebFrameLoader _loadRequest:triggeringAction:loadType:formState:]):
        (-[WebFrameLoader _reloadAllowingStaleDataWithOverrideEncoding:]):
        (-[WebFrameLoader reload]):
        * WebView/WebFrame.m:
        (-[WebFrame _loadItem:withLoadType:]):
        (-[WebFrame _continueLoadRequestAfterNewWindowPolicy:frameName:formState:]):
        (-[WebFrame _loadURL:referrer:loadType:target:triggeringEvent:form:formValues:]):
        (-[WebFrame _postWithURL:referrer:target:data:contentType:triggeringEvent:form:formValues:]):
        (-[WebFrame _shouldReloadToHandleUnreachableURLFromRequest:]):
        (-[WebFrame loadRequest:]):
        (-[WebFrame loadArchive:]):
        (-[WebFrame reload]):
        * WebView/WebFrameInternal.h:
        * WebView/WebFramePrivate.h:
        * WebView/WebView.m:
        (-[WebView setCustomTextEncodingName:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16006 268f45cc-cd09-0410-ab3c-d52691b4dbfc