- start on factoring WebArchive unpacking more into a separate class.
        http://bugzilla.opendarwin.org/show_bug.cgi?id=8208
        
        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebDataSource.m:
        (-[WebDataSourcePrivate dealloc]):
        (-[WebDataSource _addToUnarchiveState:]):
        (-[WebDataSource _popSubframeArchiveWithName:]):
        (-[WebDataSource _documentFragmentWithArchive:]):
        (-[WebDataSource _setupForReplaceByMIMEType:]):
        (-[WebDataSource subresourceForURL:]):
        * WebView/WebDataSourcePrivate.h:
        * WebView/WebFrame.m:
        (-[WebFrame _loadRequest:archive:]):
        (-[WebFrame loadRequest:]):
        (-[WebFrame loadArchive:]):
        * WebView/WebFramePrivate.h:
        * WebView/WebHTMLRepresentation.m:
        (-[WebHTMLRepresentation loadArchive]):
        * WebView/WebUnarchivingState.h: Added.
        * WebView/WebUnarchivingState.m: Added.
        (-[WebUnarchivingState init]):
        (-[WebUnarchivingState addArchive:]):
        (-[WebUnarchivingState archivedResourceForURL:]):
        (-[WebUnarchivingState popSubframeArchiveWithFrameName:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@13714 268f45cc-cd09-0410-ab3c-d52691b4dbfc