Make comment about symbol_level=2 explicit that it slows compile

Make comment about symbol_level=2 explicit that it slows compile

As seen in this thread, symbol_level=2 doesn't make a big runtime
change but is avoided to make the build faster.

https://groups.google.com/a/chromium.org/d/topic/chromium-dev/AZZ04wssLoY/discussion

R=thakis@chromium.org

Review-Url: https://codereview.chromium.org/2690143005
Cr-Commit-Position: refs/heads/master@{#450604}
Committed: https://chromium.googlesource.com/chromium/src/+/f167e0d77f11f8f1770607d39bd9205dfd1403bb

[danakj, 2017-02-14 22:46:36]

The CQ bit was checked by danakj@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-14 22:47:24]

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

[danakj, 2017-02-15 00:20:29]

danakj@chromium.org changed reviewers:
+ dpranke@google.com

[Nico, 2017-02-15 00:28:00]

lgtm

[Dirk Pranke, 2017-02-15 00:35:41]

dpranke@chromium.org changed reviewers:
+ dpranke@chromium.org

[Dirk Pranke, 2017-02-15 00:35:42]

lgtm

[commit-bot: I haz the power, 2017-02-15 00:40:25]

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

[commit-bot: I haz the power, 2017-02-15 00:40:25]

Dry run: This issue passed the CQ dry run.

[danakj, 2017-02-15 00:42:02]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2017-02-15 00:42:51]

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, 2017-02-15 06:45:12]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487119322076880, "parent_rev":
"daa11eb2cfc2fc1597e23d4e187810bc4bfd1517", "commit_rev":
"f167e0d77f11f8f1770607d39bd9205dfd1403bb"}

[commit-bot: I haz the power, 2017-02-15 06:45:47]

Description was changed from

==========
Make comment about symbol_level=2 explicit that it slows compile

As seen in this thread, symbol_level=2 doesn't make a big runtime
change but is avoided to make the build faster.

https://groups.google.com/a/chromium.org/d/topic/chromium-dev/AZZ04wssLoY/dis...

R=thakis@chromium.org
==========

to

==========
Make comment about symbol_level=2 explicit that it slows compile

As seen in this thread, symbol_level=2 doesn't make a big runtime
change but is avoided to make the build faster.

https://groups.google.com/a/chromium.org/d/topic/chromium-dev/AZZ04wssLoY/dis...

R=thakis@chromium.org

Review-Url: https://codereview.chromium.org/2690143005
Cr-Commit-Position: refs/heads/master@{#450604}
Committed:
https://chromium.googlesource.com/chromium/src/+/f167e0d77f11f8f1770607d39bd9...
==========

[commit-bot: I haz the power, 2017-02-15 06:45:48]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f167e0d77f11f8f1770607d39bd9...