Revert of [wasm][asm.js] Turn on asm.js -> WebAssembly by default.

Revert of [wasm][asm.js] Turn on asm.js -> WebAssembly by default. (patchset #2 id:20001 of https://codereview.chromium.org/2625823006/ )

Reason for revert:
Suspecting this CL is causing these tests to fail:
fast/workers/worker-shared-asm-buffer.html
virtual/sharedarraybuffer/fast/workers/worker-shared-asm-buffer.html

From the layout test results, it seems that turning on asm.js will append some console results to the test outcome.
Example build:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty/builds/22022

Original issue's description:
> [wasm][asm.js] Turn on asm.js -> WebAssembly by default.
> 
> BUG=v8:4203
> R=danno@chromium.org,titzer@chromium.org,jochen@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2625823006
> Cr-Commit-Position: refs/heads/master@{#443289}
> Committed: https://chromium.googlesource.com/chromium/src/+/7417bea53a78a97ae815479e5d73cf0840d90c88

TBR=jochen@chromium.org,bradnelson@google.com,danno@chromium.org,titzer@chromium.org,bradnelson@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4203
Review-Url: https://codereview.chromium.org/2631543002
Cr-Commit-Position: refs/heads/master@{#443330}
Committed: https://chromium.googlesource.com/chromium/src/+/06def717acdab6e6127ca99f90a6300139d03c36

[xlai (Olivia), 2017-01-12 19:48:35]

The CQ bit was checked by xlai@chromium.org

[xlai (Olivia), 2017-01-12 19:48:37]

Created Revert of [wasm][asm.js] Turn on asm.js -> WebAssembly by default.

[commit-bot: I haz the power, 2017-01-12 19:49:44]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-12 19:50:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484250515839190, "parent_rev":
"964a915d2be684a7b7c509a5a3701e156850a3e1", "commit_rev":
"06def717acdab6e6127ca99f90a6300139d03c36"}

[commit-bot: I haz the power, 2017-01-12 19:50:56]

Description was changed from

==========
Revert of [wasm][asm.js] Turn on asm.js -> WebAssembly by default. (patchset #2
id:20001 of https://codereview.chromium.org/2625823006/ )

Reason for revert:
Suspecting this CL is causing these tests to fail:
fast/workers/worker-shared-asm-buffer.html
virtual/sharedarraybuffer/fast/workers/worker-shared-asm-buffer.html

From the layout test results, it seems that turning on asm.js will append some
console results to the test outcome.
Example build:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty...

Original issue's description:
> [wasm][asm.js] Turn on asm.js -> WebAssembly by default.
> 
> BUG=v8:4203
> R=danno@chromium.org,titzer@chromium.org,jochen@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2625823006
> Cr-Commit-Position: refs/heads/master@{#443289}
> Committed:
https://chromium.googlesource.com/chromium/src/+/7417bea53a78a97ae815479e5d73...

TBR=jochen@chromium.org,bradnelson@google.com,danno@chromium.org,titzer@chrom...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4203
==========

to

==========
Revert of [wasm][asm.js] Turn on asm.js -> WebAssembly by default. (patchset #2
id:20001 of https://codereview.chromium.org/2625823006/ )

Reason for revert:
Suspecting this CL is causing these tests to fail:
fast/workers/worker-shared-asm-buffer.html
virtual/sharedarraybuffer/fast/workers/worker-shared-asm-buffer.html

From the layout test results, it seems that turning on asm.js will append some
console results to the test outcome.
Example build:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty...

Original issue's description:
> [wasm][asm.js] Turn on asm.js -> WebAssembly by default.
> 
> BUG=v8:4203
> R=danno@chromium.org,titzer@chromium.org,jochen@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2625823006
> Cr-Commit-Position: refs/heads/master@{#443289}
> Committed:
https://chromium.googlesource.com/chromium/src/+/7417bea53a78a97ae815479e5d73...

TBR=jochen@chromium.org,bradnelson@google.com,danno@chromium.org,titzer@chrom...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4203

Review-Url: https://codereview.chromium.org/2631543002
Cr-Commit-Position: refs/heads/master@{#443330}
Committed:
https://chromium.googlesource.com/chromium/src/+/06def717acdab6e6127ca99f90a6...
==========

[commit-bot: I haz the power, 2017-01-12 19:50:57]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/06def717acdab6e6127ca99f90a6...