ThreadRestrictions: inline function definitions in Release mode
ThreadRestrictions: inline function definitions in Release mode

This prevents symbol conflicts when the header is #included from
multiple sources.

TEST=no compile errors in debug or release modes

Review URL: http://codereview.chromium.org/3999006

git-svn-id: http://src.chromium.org/svn/trunk/src@63596 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 70f0137fdd3b12e2310941fde5af9a619c9d313f
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