ieframe: Added DISPID_WINDOWCLOSING tests.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
http://testbot.winehq.org/JobDetails.pl?Key=25096

Your paranoid android.


=== W2KPROSP4 (32 bit webbrowser) ===
webbrowser.c:2631: Test failed: expected GetOverridesKeyPath
webbrowser.c:2636: Test failed: expected Invoke_SETSECURELOCKICON
webbrowser.c:2637: Test failed: expected Invoke_FILEDOWNLOAD
webbrowser.c:3076: Test failed: doc_disp == NULL
webbrowser: unhandled exception c0000005 at 00402F21