Log an error message when deleting lockfile or socket fails in ProcessSingletonLinux. Also, include full path in error about creating the lock.
Log an error message when deleting lockfile or socket fails in ProcessSingletonLinux.
Also, include full path in error about creating the lock.

BUG=20982
TEST=chown your profile & lockfile to root.root and run.  Should print error about unlink ... permission denied.

Review URL: http://codereview.chromium.org/193105

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@26169 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