Hack around broken snapshot generation in the GN build on Android.

Hack around broken snapshot generation in the GN build on Android.

The generated snapshot just crashes on the device, but
disabling snapshots allows us to run V8 just fine which
is sufficient for our purposes at this point.

Mojo/Sky are GN-only so we depend on the V8 GN build even if
it's not considered production for Chromium yet.

R=jochen@chromium.org

Committed: https://crrev.com/3e97df1ee8b8bfdddd63ad3c7b79960d24c83b74
Cr-Commit-Position: refs/heads/master@{#25982}

[jochen (gone - plz use gerrit), 2015-01-07 13:43:37]

lgtm

[eseidel, 2015-01-07 20:11:15]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2015-01-07 20:12:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/832413005/1

[commit-bot: I haz the power, 2015-01-07 20:39:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-07 20:39:43]

Patchset 1 (id:??) landed as
https://crrev.com/3e97df1ee8b8bfdddd63ad3c7b79960d24c83b74
Cr-Commit-Position: refs/heads/master@{#25982}

[Michael Achenbach, 2015-01-08 10:43:57]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/841043002/ by machenbach@chromium.org.

The reason for reverting is: Suspected to block the current v8 roll:
https://codereview.chromium.org/842783003/.

[eseidel1, 2015-01-08 19:14:05]

eseidel@google.com changed reviewers:
+ eseidel@google.com

[eseidel1, 2015-01-08 19:14:06]

Great  Can we just fix the ASSERT instead?  The snapshot definitely does not
work on ARM when built from GN :)

[jochen (gone - plz use gerrit), 2015-01-08 19:23:01]

as far as I see the assert() is actually correct :)

I'm not sure whether hacking the entire config to skip the snapshot on android
is the right way forward even temporarily. Since Brett is trying to bring up d8
for chromium, we'll need a working snapshot anyway.

maybe adding a block like this
https://code.google.com/p/chromium/codesearch#chromium/src/v8/BUILD.gn&l=125 for
arm should be already enough to get the snapshot working?