provisionalDataSourceCommitted: methods into a single
	setDataSource:, since they are always called one immediately after
	the other.

        * Plugins.subproj/WebPluginView.m:
        (-[WebNetscapePluginView setDataSource:]):
        (-[WebNetscapePluginView loadRequest:inTarget:withNotifyData:]):
        * WebView.subproj/WebDocument.h:
        * WebView.subproj/WebHTMLView.m:
        (-[WebHTMLView setDataSource:]):
        * WebView.subproj/WebImageView.m:
        (-[WebImageView setDataSource:]):
        * WebView.subproj/WebTextView.m:
        (-[WebTextView setDataSource:]):
        * WebView.subproj/WebViewPrivate.m:
        (-[WebView _makeDocumentViewForDataSource:]):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2040 268f45cc-cd09-0410-ab3c-d52691b4dbfc