Loading local resources uses improved fallback algorithm.

Before:
 _locales/current_locale/rel_path, then extension root/rel_path

Now:
 _locales/{current_locale, parents}/rel_path, then extension root/rel_path

This change syncs local resource loading with catalog loading algo.

BUG=12131

Review URL: http://codereview.chromium.org/316013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29815 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed