[Tizen] Remove crosswalk-2.31-enable-VAVDA-with-EGL.patch.

This patch was added but was never used by the spec file. Since nobody has
complained for almost 5 months, it should be safe to remove it.
[Runtime] Fix browsertest issue on Linux.

Browsertest 'OnLaunchAndSuspendEventTest' failed on Linux due to
'onLaunched' event is not fired by local path launch.

The PR will fix above issue.
[Tizen][Runtime] Add the unittest for WGT widget handler.

This unit test let widget handler parse widget info
from manifest, and then check this widget info.

Widget info include 10 items of string info and
0 or more preference items.
So tests include:
-ParseManifestWithOnlyNameAndVersion
-ParseManifestWithAllOfOtherItemsAndOnePreferenceItem
-ParseManifestWithAllOfOtherItemsAndThreePreferenceItemsList
Merge pull request #1745 from rakuco/remove-unused-tizen-patch

[Tizen] Remove crosswalk-2.31-enable-VAVDA-with-EGL.patch.
Merge pull request #1748 from shaochangbin/fix-browsertest

[Runtime] Fix browsertest issue on Linux.
Merge pull request #1741 from yeyuyinjie/master

[Tizen][Runtime] Add the unittest for WGT widget handler.