Fix DCHECK on download item removal, take 2.
Fix DCHECK on download item removal, take 2.

We can't delay destroying the download item view because it has to be destoyed before the download model is destroyed. Insted we delay the execution of the command.

Review URL: http://codereview.chromium.org/173458

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@24507 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