Reset task manager after an item is deleted to update indentation.
Reset task manager after an item is deleted to update indentation.

BUG=65387
TEST=Open task manager, open two new tabs, close first tab

Review URL: http://codereview.chromium.org/5656007

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@68692 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