Revert of [Turbofan] Fix perf regression

Revert of [Turbofan] Fix perf regression (patchset #1 id:1 of https://codereview.chromium.org/1412123009/ )

Reason for revert:
[sheriff] breaks benchmarks:
http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/4998

Original issue's description:
> [Turbofan] Fix perf regression introduced by per-range change.
>
> When the range ends just at the gap of a non-deferred block, the last
> instruction the range covers is in the predecessor. If that predecessor is
> a deferred block, before this CL, we would splinter the remainder of the
> range all the way to the end. That leads to inefficient codegen, because
> we still want a split inside the deferred block.
>
> Also, opportunistically added a trace before we splinter, for better
> diagnostics.
>
> BUG=chromium:546416
> LOG=N
>
> Committed: https://crrev.com/32b6e085e74a8fcf94a01d20740fe4fdede07a86
> Cr-Commit-Position: refs/heads/master@{#31529}

TBR=bmeurer@chromium.org,jarin@chromium.org,mtrofin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:546416
Committed: https://crrev.com/5308a999eb3540c3ca19d4ba08d788a4970431e8
Cr-Commit-Position: refs/heads/master@{#31531}

[Michael Achenbach, 2015-10-23 17:39:55]

Created Revert of [Turbofan] Fix perf regression

[commit-bot: I haz the power, 2015-10-23 17:40:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1412893007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1412893007/1

[commit-bot: I haz the power, 2015-10-23 17:40:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-23 17:40:34]

Patchset 1 (id:??) landed as
https://crrev.com/5308a999eb3540c3ca19d4ba08d788a4970431e8
Cr-Commit-Position: refs/heads/master@{#31531}