Reviewed by Sam Weinig.

        Make WebNetscapePluginStream a WebCore::NetscapePlugInStreamLoaderClient.
        
        * Plugins/WebBaseNetscapePluginStream.h:
        (WebNetscapePluginStream::~WebNetscapePluginStream):
        * Plugins/WebBaseNetscapePluginStream.mm:
        (WebNetscapePluginStream::didReceiveResponse):
        (-[WebBaseNetscapePluginStream startStreamWithResponse:]):
        (WebNetscapePluginStream::wantsAllStreams):
        (-[WebBaseNetscapePluginStream wantsAllStreams]):
        (WebNetscapePluginStream::didFail):
        (-[WebBaseNetscapePluginStream destroyStreamWithError:]):
        (WebNetscapePluginStream::didFinishLoading):
        (-[WebBaseNetscapePluginStream finishedLoading]):
        (WebNetscapePluginStream::didReceiveData):
        (-[WebBaseNetscapePluginStream receivedData:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@37347 268f45cc-cd09-0410-ab3c-d52691b4dbfc