Add command line flags to dump asm.js -> wasm conversion data.

Add command line flags to dump asm.js -> wasm conversion data.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=manual
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N

Committed: https://crrev.com/a26d0ac676ffc96a886e294728e69f5e7ba11b25
Cr-Commit-Position: refs/heads/master@{#34009}

[bradn, 2016-02-13 00:58:55]

The CQ bit was checked by bradnelson@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-02-13 00:59:07]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1697723002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1697723002/1

[commit-bot: I haz the power, 2016-02-13 01:20:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-02-13 01:20:29]

Dry run: This issue passed the CQ dry run.

[aseemgarg, 2016-02-13 01:54:25]

lgtm
Even though this will only be used for debugging, still multiple processes can
potentially corrupt the output. Is that a concern?

[bradn, 2016-02-13 01:55:29]

Only one thread without SABs turned on :-)

[bradn, 2016-02-13 01:55:44]

Ben, will need an OWNERs lg for flags.

[bradn, 2016-02-13 01:56:12]

Oh yes, multiple processes, hmmn, same is true of v8.log

[titzer, 2016-02-14 11:19:23]

On 2016/02/13 01:56:12, bradn wrote:
> Oh yes, multiple processes, hmmn, same is true of v8.log

lgtm

[bradn, 2016-02-16 02:25:15]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2016-02-16 02:25:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1697723002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1697723002/1

[commit-bot: I haz the power, 2016-02-16 03:02:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-16 03:03:31]

Description was changed from

==========
Add command line flags to dump asm.js -> wasm conversion data.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=manual
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N
==========

to

==========
Add command line flags to dump asm.js -> wasm conversion data.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=manual
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N

Committed: https://crrev.com/a26d0ac676ffc96a886e294728e69f5e7ba11b25
Cr-Commit-Position: refs/heads/master@{#34009}
==========

[commit-bot: I haz the power, 2016-02-16 03:03:32]

Patchset 1 (id:??) landed as
https://crrev.com/a26d0ac676ffc96a886e294728e69f5e7ba11b25
Cr-Commit-Position: refs/heads/master@{#34009}