port 40fbed06 (r30581)

original commit message:

    The last changes for vector store functionality, they are in 3 areas:

    1) The new vector [keyed] store code stubs - implementation.
    2) IC and handler compiler adjustments
    3) Odds and ends. A change in ast.cc, a test update, a small Oracle fix.

BUG=

Review URL: https://codereview.chromium.org/1311413007

Cr-Commit-Position: refs/heads/master@{#30612}