Fix System.nativeArraycopy and (native) String.valueOf

root cause:
call stack limitations of Function.prototype.apply implementations.
http://stackoverflow.com/questions/18308700


Bug: issue 7651, issue 8239
Change-Id: I8d7ab5bc98976b27e6ab1db66882d26046b17c2b
Review-Link: https://gwt-review.googlesource.com/#/c/6310/
5 files changed