Fix a deprecated use of wstring/GetSwitchValue() for --file-descriptor-limit.
Fix a deprecated use of wstring/GetSwitchValue() for --file-descriptor-limit.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/1764001

git-svn-id: http://src.chromium.org/svn/trunk/src@45231 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 439ae081c49da80e0e773d6a0ae971400730e51d
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser