[wrt] update common
[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 25 , deleted 0
Unit test platform: [Tizen]
Test Result: Pass 20, fail 4, block 1
BugID: https://crosswalk-project.org/jira/browse/XWALK-2812
Merge pull request #1170 from linshen/shenlin/update-tct

[wrt] update common
[webapi] Integrate 161 tests for Web Audio

- Update window.AudioContext to new AudioContext()
- approved: 113, designed: 48

Impacted tests(approved): new 113, update 0, delete 0
Unit test platform: [IVI] crosswalk-10.38.222, t-e-c 0.107
Unit test result summary: pass 113, fail 0, block 0
[webapi] Integrate 192 tests for webdatabase

 -  designed: 89, approved: 103

Impacted tests(approved): new 103, update 0, delete 0
Unit test platform: [Tizen IVI][Android]
Unit test result summary: pass 103, fail 0, block 0
Merge pull request #1173 from yunxiaoxie/move-webdatabase

[webapi] Integrate 192 tests for webdatabase
Merge pull request #1171 from xinliux/webaudio-integrate

[webapi] Integrate 161 tests for Web Audio