[usecase-webapi] Make usecase of Workers better.

- Modify the button name 'Start' to 'Calculation'.

Impacted tests(approved): New 0, Update 1, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 1, Fail 0, Block 0
[usecase-webapi] Improve vibration for misc usecase w3c

- Use vibration "on/off" button and button style "center"

Impacted TCs num(designed): New 0, Update 1, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[usecase-webapi] Improve SIMD usecase

- Adjust the case with screen view

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Andriod]
Test result summary: Pass 1, Fail 0, Blocked 0
[usecase-webapi] Improve the w3c usecase for HrtimeTizen
[usecase-webapi] Improve the usecase for HrtimrAndroid

- Change button to "Waiting" when play, and disable the button. Change back when play end.
- Put the result info "The time of video playing is" below the play button.
- Remove "Android" and "Tizen" in test purpose

Impacted tests(designed|approved): new 0, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 1, fail 0, block 0
Fix tests incompatible with latest WebSocket spec.

[Issue#]   265
[Problem]  Failing TCT tests.
[Cause]    The tests call WebSocket.close() and expect to get an
           onmessage event after the call and before the
           connection is closed. This can not happen according to
           the WebSocket spec.

           There are two important points:

           The first point is what WebSocket.close() is supposed
           to do:
           http://www.w3.org/TR/websockets/#dom-websocket-close

           3. -> Otherwise section applies in all tests:
           "Set the readyState attribute's value to CLOSING"

           The other point is what happens when readyState is
           not OPEN:

           http://www.w3.org/TR/websockets/#feedback-from-the-protocol

           "When a WebSocket message has been received ... follow
            these steps:

           1. If the readyState attribute's value is not OPEN, then
              abort these steps."

           Chromium aborts at step one, preventing any further
           onmessage events. The event handler would be called in
           step 5.

           All these tests call WebSocket.close() before the onmessage
           event is received, preventing the event to be delivered.

[Solution] Move the call to WebSocket.close() to the end of the
           onmessage event handler.

Change-Id: I068c008de8972c01a1d815c16ad16f9fe21a5ae0
[usecase-webapi] Improve Flexible w3c usecase

- Draw the flex box one by one in the first page
- Give a meaningful description of pass/fail criteria whether in sub test title, or case details.

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI][Android]
Unit test result summary: pass 1, fail 0, block 0
[usecase-webapi] Improve AppURL usecase

- Group the url info in a div, and Add a get button.

Impacted TCs num(designed): New 0, Update 1, Delete 0
Unit test Platform: Tizen M0,Tizen IVI
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[usecase-webapi] Improve Clipboard usecase

- Modify button name "Launch" to "Launch clipboard test" and remove button "Retest"

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Andriod]
Test result summary: Pass 1, Fail 0, Blocked 0
[Xmlhttprequest] Fix xmlhttprequest tests.

Tests are incompatible with the XMLHTTPRequest
spec: http://www.w3.org/TR/XMLHttpRequest/
In current implementation send() may be called after abort()
This causes tests to fail.

Change-Id: I09720b8a2c88b277cf846f584b0ccf1002aeff6a
fixture 1
[usecase-webapi] Fix bugs of Canvas.

- Clean the show frame when click the buttons everytime.
- Better to enhance the test: Roate 90, 180, 270, 360. Scale 50%, 200%.
- Make sure that each action based on the original picture.

Impacted tests(approved): New 0, Update 1, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 1, Fail 0, Block 0
[usecase-webapi] Improve Viewport usecase.

Impacted tests(approved): New 0, Update 1, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 1, Fail 0, Block 0
[usecase-webapi] Improve CSSAnimation usecase.

- Remove test again.
- Reduce the animation delay time.
- Add description for the animation.

Impacted tests(approved): New 0, Update 1, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 1, Fail 0, Block 0
[usecase-webapi] Improve WebSpeech usecase

- Adjust the case with screen view
- Failure analysis: Could not connect to speech recognition service

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
[usecase-webapi] Improve WebRTC usecase

- Adjust the case with screen view
- Failure analysis: https://crosswalk-project.org/jira/browse/XWALK-1535

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
Merge pull request #523 from minxhuang/hm/misc/usecase-w3c/Workers-hotfix

[usecase-webapi] Improve Workers usecase.
Merge pull request #527 from minxhuang/hm/misc/usecase-w3c/CSSAnimation-hotfix

[usecase-webapi] Improve CSSAnimation usecase.
Merge pull request #540 from xinliux/xinliux/usecase/vibration-improve

[usecase-webapi] Improve vibration for misc usecase w3c
Merge pull request #545 from minxhuang/hm/misc/usecase-w3c/Canvas-hotfix

[usecase-webapi] Improve Canvas usecase.