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ChromeFrame VTable patches the IInternetProtocol interface for the CLSID_HttpProtocol
and CLSID_HttpSProtocol handlers. However we were using the same VTable information to patch both
the handlers essentially overwriting the first one. While this all worked purely by chance, it
exposed a bug in IE8 where every new tab initially goes into a new process and if the chromeframe
is unloaded we would leave behind an IInternetProtocol interface in urlmon patched, which would
crash when dereferenced.
Added a check in the VTable patching code for this case.
This fixes bug http://code.google.com/p/chromium/issues/detail?id=22768
Bug=22768
Review URL: http://codereview.chromium.org/244002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27191 0039d316-1c4b-4281-b951-d872f2087c98
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