For system level install read setup.exe path from HKLM instead of HKCU.
For system level install read setup.exe path from HKLM instead of HKCU.

Also register extensions separately for Chrome and Chromium (only one can be made default at one time).

BUG=9697

Review URL: http://codereview.chromium.org/101001


git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@14739 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