Reviewed by David Hyatt.

        Convert more methods over to C++.
        
        * Plugins/WebBaseNetscapePluginStream.h:
        * Plugins/WebBaseNetscapePluginStream.mm:
        (WebNetscapePluginStream::ownerForStream):
        (WebNetscapePluginStream::pluginCancelledConnectionError):
        (WebNetscapePluginStream::errorForReason):
        (-[WebBaseNetscapePluginStream errorForReason:]):
        (-[WebBaseNetscapePluginStream startStreamResponseURL:expectedContentLength:lastModifiedDate:MIMEType:headers:]):
        (WebNetscapePluginStream::cancelLoadAndDestroyStreamWithError):
        (-[WebBaseNetscapePluginStream cancelLoadAndDestroyStreamWithError:]):
        (WebNetscapePluginStream::deliverData):
        (WebNetscapePluginStream::deliverDataTimerFired):
        (WebNetscapePluginStream::deliverDataToFile):
        (-[WebBaseNetscapePluginStream finishedLoading]):
        (-[WebBaseNetscapePluginStream receivedData:]):
        * Plugins/WebBaseNetscapePluginView.mm:
        (-[WebBaseNetscapePluginView destroyStream:reason:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@37342 268f45cc-cd09-0410-ab3c-d52691b4dbfc