Merged r17711 into 3.20 branch.

Cherrypick of V8 3.20 r17712.

Fix overflow in TypedArray initialization function

BUG=chromium:319120
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/72473002

Bug: 11684308
Change-Id: Ifaf4c8ecd1963d50a39af5aa948d6b9a6a039e9b
git-svn-id: http://v8.googlecode.com/svn/branches/3.20@17712 ce2b1a6d-e550-0410-aec6-3dcde31c8c00