Add missing lazy deopt point for the TransitionElementsKind instruction.

R=mvstanton@chromium.org, yangguo@chromium.org
BUG=357105
TEST=test/mjsunit/regress/regress-357105.js
LOG=N

Review URL: https://codereview.chromium.org/216963002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20347 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix LoadFieldByIndex to take mutable heap-numbers into account.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/213213002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20348 ce2b1a6d-e550-0410-aec6-3dcde31c8c00