src/base/hash_tables.h has moved to src/base/containers/hash_tables.h in r205241.

R=maruel@chromium.org

Review URL: https://chromiumcodereview.appspot.com/16787005

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@205662 0039d316-1c4b-4281-b951-d872f2087c98