Revert "[profiler] Make no frame region detection code more robust", "Fix ASAN after r30777" and "F…

Revert "[profiler] Make no frame region detection code more robust", "Fix ASAN after r30777" and "Fix MSAN warning after r30777 (try 2)"

This reverts commits 12c7bc9a226859c3200609495689592a675a21af,
cb0b3592258173c4d20e1500cbd5731e15b9e8b1, and
a6e00c6a9f5a8abf2747293d7452dd0cf572c99e, because they introduced weird
flaky crashes in random places now at least in the arm simulator, where
it see that quite often now on different change sets, i.e. see

http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/8138/steps/Check%20%28flakes%29/logs/LoadICFastApi_DirectC..

and

https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20mipsel%20-%20sim/builds/2566/steps/Check%20%28flakes%29/logs/LoadICFastApi_DirectC..

for example.

TBR=alph@chromium.org
BUG=chromium:529931
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
LOG=N

Committed: https://crrev.com/7be2555151c63ec5e0ec23da980bd302b5baa9ed
Cr-Commit-Position: refs/heads/master@{#30786}

[Benedikt Meurer, 2015-09-17 06:30:59]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-09-17 06:31:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1354573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1354573002/1

[commit-bot: I haz the power, 2015-09-17 06:31:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-17 06:31:41]

Patchset 1 (id:??) landed as
https://crrev.com/7be2555151c63ec5e0ec23da980bd302b5baa9ed
Cr-Commit-Position: refs/heads/master@{#30786}

[alph, 2015-09-17 06:35:24]

Thanks. I'm looking into these.

[Benedikt Meurer, 2015-09-17 06:36:38]

Please don't try to fix *SAN issues in the tree. That makes it harder to revert
CLs. If you notice an issue, try to revert the offending CL, and only reland
with a fix after you pass the tests locally and on the relevant try bots.