Revert of Revert of Inlining DeathData accessors, per earlier CR's comment

Revert of Revert of Inlining DeathData accessors, per earlier CR's comment (patchset #1 id:1 of https://codereview.chromium.org/1118753003/)

Reason for revert:
Since the crash reports started before the original CL landed, reverting the revert.

Original issue's description:
> Revert of Inlining DeathData accessors, per earlier CR's comment (patchset #1 id:1 of https://codereview.chromium.org/1113463003/)
>
> Reason for revert:
> Suspecting this CL caused crashes (https://code.google.com/p/chromium/issues/detail?id=483255).
>
> Original issue's description:
> > Inlining DeathData accessors, per earlier CR's comment.
> >
> > BUG=456354
> >
> > Committed: https://crrev.com/9e0a3c19c221db002fdd5512b0d56dde675e005b
> > Cr-Commit-Position: refs/heads/master@{#327350}
>
> TBR=asvitkine@google.com,isherman@chromium.org,asvitkine@chromium.org,cpu@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=456354
>
> Committed: https://crrev.com/f02f0cc4ee8f12e53cd57a97bd2d6ef4c3af87ff
> Cr-Commit-Position: refs/heads/master@{#327798}

TBR=asvitkine@google.com,isherman@chromium.org,asvitkine@chromium.org,cpu@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=456354
Committed: https://crrev.com/b9d054ae28126276b156f55e6d10c25a38914de2
Cr-Commit-Position: refs/heads/master@{#328625}

[vadimt, 2015-05-06 22:12:08]

Created Revert of Revert of Inlining DeathData accessors, per earlier CR's
comment

[commit-bot: I haz the power, 2015-05-06 22:12:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1129073002/1

[commit-bot: I haz the power, 2015-05-06 22:15:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-06 22:15:58]

Patchset 1 (id:??) landed as
https://crrev.com/b9d054ae28126276b156f55e6d10c25a38914de2
Cr-Commit-Position: refs/heads/master@{#328625}