Move new-space allocation tracking into Heap::AllocateRaw.

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/66683004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17605 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reland 17588: Add signed/unsigned 8-bit and 16-bit Representations to Crankshaft

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/66193004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17606 ce2b1a6d-e550-0410-aec6-3dcde31c8c00