Fix usage of --log-net-log on chromeos.
Fix usage of --log-net-log on chromeos.

BUG=chromium-os:25696
TEST=Using --log-net-log on chromeos works and doesn't crash


Review URL: http://codereview.chromium.org/9592005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@125160 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,ropik/chromium