Reviewed by Maciej

    Reviewed by Maciej

        Split much of unused WebHistoryItemPrivate.h SPI into WebHistoryItemInternal.h

        * History/WebBackForwardList.m:
        * History/WebHistory.m:
        * History/WebHistoryItem.m:
        (-[WebHistoryItem initWithURLString:title:lastVisitedTimeInterval:]):
        (-[WebHistoryItem initWithURL:title:]):
        (-[WebHistoryItem visitCount]):
        (-[WebHistoryItem RSSFeedReferrer]):
        (-[WebHistoryItem setRSSFeedReferrer:]):
        (-[WebHistoryItem children]):
        (-[WebHistoryItem dictionaryRepresentation]):
        (-[WebHistoryItem setAlwaysAttemptToUsePageCache:]):
        (+[WebHistoryItem _releaseAllPendingPageCaches]):
        (-[WebHistoryItem URL]):
        (-[WebHistoryItem target]):
        (-[WebHistoryItem _setLastVisitedTimeInterval:]):
        (-[WebHistoryItem _lastVisitedDate]):
        (-[WebHistoryItem targetItem]):
        * History/WebHistoryItemInternal.h: Added.
        * History/WebHistoryItemPrivate.h:
        * WebCoreSupport/WebFrameBridge.mm:
        * WebCoreSupport/WebFrameLoaderClient.mm:
        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebFrame.mm:
        * WebView/WebView.mm:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17779 268f45cc-cd09-0410-ab3c-d52691b4dbfc