Re-land r405933 w/ fix for CrOS.

Re-land r405933 w/ fix for CrOS.

This CL re-lands r405933 and removes the hack that was needed while
rolling in the reworked v8_target_cpu code, but this adds the missing
line that was needed for CrOS to work correctly with their custom
toolchain.

TBR=machenbach@chromium.org, llozano@chromium.org
BUG=593461, 625353
Committed: https://crrev.com/702414254eea4221cc4d36eb1ca4c1f9636699c1
Cr-Commit-Position: refs/heads/master@{#406115}

[Dirk Pranke, 2016-07-18 19:28:15]

The problem with the original CL is that, in non-CrOS builds, the build files
figure out which snapshot toolchain to use and the toolchain sets
v8_toolchain_cpu correctly, but since CrOS explicitly sets its own toolchain,
that code hadn't been updated.

[Dirk Pranke, 2016-07-18 19:28:18]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2016-07-18 19:29:22]

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

[Michael Achenbach, 2016-07-18 19:34:37]

lgtm

[commit-bot: I haz the power, 2016-07-18 20:37:06]

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

[commit-bot: I haz the power, 2016-07-18 20:37:07]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Dirk Pranke, 2016-07-18 21:05:31]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2016-07-18 21:06:51]

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, 2016-07-18 22:03:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-18 22:05:48]

Description was changed from

==========
Re-land r405933 w/ fix for CrOS.

This CL re-lands r405933 and removes the hack that was needed while
rolling in the reworked v8_target_cpu code, but this adds the missing
line that was needed for CrOS to work correctly with their custom
toolchain.

TBR=machenbach@chromium.org, llozano@chromium.org
BUG=593461, 625353
==========

to

==========
Re-land r405933 w/ fix for CrOS.

This CL re-lands r405933 and removes the hack that was needed while
rolling in the reworked v8_target_cpu code, but this adds the missing
line that was needed for CrOS to work correctly with their custom
toolchain.

TBR=machenbach@chromium.org, llozano@chromium.org
BUG=593461, 625353

Committed: https://crrev.com/702414254eea4221cc4d36eb1ca4c1f9636699c1
Cr-Commit-Position: refs/heads/master@{#406115}
==========

[commit-bot: I haz the power, 2016-07-18 22:05:49]

Patchset 2 (id:??) landed as
https://crrev.com/702414254eea4221cc4d36eb1ca4c1f9636699c1
Cr-Commit-Position: refs/heads/master@{#406115}