Reviewed by Adam, Darin.

        <rdar://problem/5025212>
        In Mail, a crash occurs at WebCore::Frame::tree() when clicking on embedded flash object

        * plugins/get-url-with-blank-target-expected.txt: Added.
        * plugins/get-url-with-blank-target.html: Added.

WebKit:

        Reviewed by Adam, Darin.
 
        <rdar://problem/5025212>
        In Mail, a crash occurs at WebCore::Frame::tree() when clicking on embedded flash object

        * Plugins/WebBaseNetscapePluginView.mm:
        (-[WebBaseNetscapePluginView loadPluginRequest:]):
        Handle the case where the web view returned from the delegate method is null. Also, send out an error notification
        in that case so we can catch it.

WebKitTools:

        Reviewed by Adam, Darin.

        <rdar://problem/5025212>
        In Mail, a crash occurs at WebCore::Frame::tree() when clicking on embedded flash object
        
        Add a "getURLNotify" method to the plugin object. This lets you pass a URL, a target and a callback function
        to be run when the URL has finished (or failed) loading.
        
        * DumpRenderTree/TestNetscapePlugIn.subproj/PluginObject.c:
        (pluginInvoke):
        (handleCallback):
        * DumpRenderTree/TestNetscapePlugIn.subproj/PluginObject.h:
        * DumpRenderTree/TestNetscapePlugIn.subproj/main.c:
        (NPP_URLNotify):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@19966 268f45cc-cd09-0410-ab3c-d52691b4dbfc