Original commit message:

[heap] Properly propagate allocated space during new space evacuaton in
MC

New space evaucation in MC supports, similar to scavenges, fall back
allocation in old space.

For new space evacuation we support sticky and non-sticky modes for
fallback. The sticky mode essentially removes the capability to allocate
in new space while the non-sticky mode only falls back for a single
allocation.

We use the non-sticky mode for allocations that are too large for a LAB
but should still go in new space. When such an allocation fails in new
space, we allocate in old space in non-sticky mode as we would still
like to reuse the remainder memory in new space. However, in such a case
we fail to properly report the space allocated in resulting in a missed
recorded slot.

BUG=chromium:641270
R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2280943002
Cr-Commit-Position: refs/heads/master@{#38940}

PR-URL: #9192
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>