Change the freshnessLifeTime of local files to zero, so that changes to them are not ingnored. 

Patch from Daniel Shaulov <dshaulov@ptc.com> 

BUG=268813
TBR=japhet@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23597033

git-svn-id: svn://svn.chromium.org/blink/trunk@157651 bbb929c8-8fbe-4397-9dbb-9b2b20218538