Wait for renaming chrome.exe to finish during shutdown for system level in use update. Also remove obsoleted code in this code path.
Wait for renaming chrome.exe to finish during shutdown for
system level in use update.
Also remove obsoleted code in this code path.

BUG=55969
TEST=repro steps in BUG

Review URL: http://codereview.chromium.org/3429029

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@60751 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