DO NOT MERGE Modify browser file origin policy.

Bug: 6212665

Modify browser's file origin policy to match Chrome's. This is
a cherry-pick from master. sha:
   559317c0ef684a8e9a77443343ff61a263e31168

Change-Id: Idafb4f93f61d9503df6cb0d6cedcc85a00a9827b
1 file changed