Revert "[Android] Support shared library mode for XWalkRuntime in WindowAndroid."

This reverts commit d63fbcbe8846417ff67331a07d467e56a833d803.

Because https://github.com/crosswalk-project/crosswalk/pull/803 fixes the
issue in crosswalk side. Revert the fix in chromium to decrease rebase effort.

TODO:Remove both commits when doing next rebase.
Merge pull request #65 from wang16/revert

Revert "[Android] Support shared library mode for XWalkRuntime in Window...