Fix a ChromeFrame crash which occurs while handling the open url notification from Chrome. This crash happens while attempting to dereference a NULL IWebBrowser2 interface pointer, which could occur if the client site is NULL, i.e. chrome frame is in the process of being torn down.
Fix a ChromeFrame crash which occurs while handling the open url notification from Chrome. This crash
happens while attempting to dereference a NULL IWebBrowser2 interface pointer, which could occur if
the client site is NULL, i.e. chrome frame is in the process of being torn down.

This fixes bug http://code.google.com/p/chromium/issues/detail?id=40174

Bug=40174

Review URL: http://codereview.chromium.org/1585014

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@43457 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser