Quota: Move test files for old Quota API into storage/quota directory


BUG=n/a
TEST=run_webkit_tests.sh storage/quota\*

Review URL: https://codereview.chromium.org/148773002

git-svn-id: svn://svn.chromium.org/blink/trunk@165909 bbb929c8-8fbe-4397-9dbb-9b2b20218538