[webapi] Integrate 167 tests for HTML5 Audio

- approved: 111; designed: 56

Impacted tests(approved): new 167, update 0, delete 0
Unit test platform: [IVI] crosswalk-10.38.222, t-e-c 0.107
Unit test result summary: pass 111, fail 24, block 32
Better use `assert_throw()`