[webapi] Integrate 1 test for Html5 Forms

The test comes from https://github.com/w3c/web-platform-tests/tree/master/old-tests/submission/Infraware/Forms/contents/Forms (commit 9cb8225e74cfc4fa66b41d21c555c9c8b4e9f69e)

Impacted tests(approved): new 1, update 0, delete 1
Unit test platform: [IVI]
Unit test result summary: pass 1, fail 0, block 0