[Tizen IVI] Run XWalk with title bar in windowed mode by default.

The following commit makes XWalk run in full screen mode by default
because many parts of the code guarded by OS_TIZEN_MOBILE macro
were included in Tizen IVI, but some code seem to be specific for
Tizen Mobile such as creating the root window and frameless window,
which should be excluded from Tizen IVI.

https://github.com/crosswalk-project/crosswalk/commit/459efb92ed7d39f7b9be0ee99235f9b7f9c28b0b
Merge pull request #1674 from joone/run_xwalk_windowed_mode

[Tizen IVI] Run XWalk with title bar in windowed mode by default.