Reviewed by Sam Weinig.

        Remove WebNetscapePluginEmbeddedView, it adds nothing extra now. 
        
        Remove WebNetscapePlugInStreamLoaderClient since WebNetscapePluginStream is the client now.
        
        * Plugins/WebBaseNetscapePluginStream.h:
        * Plugins/WebBaseNetscapePluginStream.mm:
        * Plugins/WebBaseNetscapePluginView.h:
        * Plugins/WebKitPluginContainerView.h:
        * Plugins/WebNetscapePluginEmbeddedView.h: Removed.
        * Plugins/WebNetscapePluginEmbeddedView.mm: Removed.
        * Plugins/WebNetscapePluginEventHandler.h:
        * WebCoreSupport/WebFrameLoaderClient.mm:
        (NetscapePluginWidget::NetscapePluginWidget):
        (NetscapePluginWidget::handleEvent):
        (WebFrameLoaderClient::createPlugin):
        * WebCoreSupport/WebNetscapePlugInStreamLoaderClient.h: Removed.
        * WebCoreSupport/WebNetscapePlugInStreamLoaderClient.mm: Removed.
        * WebView/WebHTMLView.mm:
        (-[NSArray _web_makePluginViewsPerformSelector:withObject:]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@37984 268f45cc-cd09-0410-ab3c-d52691b4dbfc