[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