Revert of Canonicalize handles for optimized compilation. (patchset #1 id:1 of https://codereview.chromium.org/1423833003/ )

Reason for revert:
GC stress failure on ia32 optdebug:

/tmp/runfswAKT/out/Debug/d8 --test --random-seed=-1536184370 --turbo --always-opt --nohard-abort --nodead-code-elimination --nofold-constants --enable-slow-asserts --debug-code --verify-heap --stack-size=46 /tmp/runfswAKT/test/mjsunit/mjsunit.js /tmp/runfswAKT/test/mjsunit/regress/regress-1132.js --gc-interval=500 --stress-compaction --concurrent-recompilation-queue-length=64 --concurrent-recompilation-delay=500 --concurrent-recompilation

Run #1
Exit code: -6
Result: FAIL
Expected outcomes: PASS
Duration: 00:06:279

Stderr:

#
# Fatal error in ../../src/hashmap.h, line 248
# Check failed: base::bits::IsPowerOfTwo32(capacity_).
#

==== C stack trace ===============================

Original issue's description:
> Canonicalize handles for optimized compilation.
>
> R=bmeurer@chromium.org
>
> Committed: https://crrev.com/15f36b2b1e166a511966a9991fddea94f890a755
> Cr-Commit-Position: refs/heads/master@{#31566}

TBR=jochen@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1417013007

Cr-Commit-Position: refs/heads/master@{#31570}