Quota: Merge test scripts into html files for cleanup


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

Review URL: https://codereview.chromium.org/149963003

git-svn-id: svn://svn.chromium.org/blink/trunk@166111 bbb929c8-8fbe-4397-9dbb-9b2b20218538