Revert of [MemSheriff] Suppress use-after-free in content::RenderFrameImpl::~RenderFrameImpl

Revert of [MemSheriff] Suppress use-after-free in content::RenderFrameImpl::~RenderFrameImpl (patchset #1 id:1 of https://codereview.chromium.org/791053005/)

Reason for revert:
The bug is expected to be fixed quite some time ago, reverting to check.

Original issue's description:
> [MemSheriff] Suppress use-after-free in content::RenderFrameImpl::~RenderFrameImpl
>
> BUG=445836
> TBR=lazyboy@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/bb25da2ef63be828fc0ae3303af0862cbca70123

TBR=bruening@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=445836
Committed: https://crrev.com/f15ce16de276c2d03186804eb8e7755cbcbcc58e
Cr-Commit-Position: refs/heads/master@{#329463}

[lazyboy, 2015-05-12 19:28:53]

Created Revert of [MemSheriff] Suppress use-after-free in
content::RenderFrameImpl::~RenderFrameImpl

[lazyboy, 2015-05-12 19:41:30]

The CQ bit was checked by lazyboy@chromium.org

[commit-bot: I haz the power, 2015-05-12 19:43:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1129973004/40001

[commit-bot: I haz the power, 2015-05-12 19:45:58]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2015-05-12 19:47:33]

Patchset 2 (id:??) landed as
https://crrev.com/f15ce16de276c2d03186804eb8e7755cbcbcc58e
Cr-Commit-Position: refs/heads/master@{#329463}