In general, is_component_build=true is only set on debug bots in Chromium. 
See e.g. https://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_ng/builds/525254 it has it to false.

See https://cs.chromium.org/chromium/src/tools/mb/mb_config.pyl?rcl=d17af2013f9588c212c613e84c5dd312d44ef1d1&l=1929 and find references to 'shared' in the file to see which bots are using it.

That said, it's probably a good idea to have at least a builder for Debug for Windows, Mac and Linux. If we decide to do so, I suggest we also get one new VM for each, to avoid slowing down the throughput of the testers (which are important for short blamelists).

I can own this since Edward is soon going OOO and Mirko has a full plate already.

Thanks for the explanation.

Yes, it seems a good idea to have at least on builder for each OS.

Thanks for taking care of this.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/17222af1fd3b7832e43cfd547507c5cc667b0fa0

commit 17222af1fd3b7832e43cfd547507c5cc667b0fa0
Author: Henrik Kjellander <kjellander@chromium.org>
Date: Thu Aug 17 10:57:24 2017

MB: Add Debug builders to chromium.webrtc.fyi

This will make it possible to catch more errors before trying to
roll WebRTC into Chromium.

Remove usage of outdated trybot configs and align with regular
Chromium builders in the Mac, Win and Linux waterfalls.

BUG= 752083 
NOTRY=True

Change-Id: I508ca09d08803adb38e5e7888a4f3206029578f9
Reviewed-on: https://chromium-review.googlesource.com/616284
Commit-Queue: Henrik Kjellander <kjellander@chromium.org>
Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#495133}
[modify] https://crrev.com/17222af1fd3b7832e43cfd547507c5cc667b0fa0/tools/mb/mb_config.pyl

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build/+/75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74

commit 75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74
Author: Henrik Kjellander <kjellander@chromium.org>
Date: Thu Aug 17 13:34:20 2017

Add Debug builders to chromium.webrtc.fyi

This will make it possible to catch more errors before trying to
roll WebRTC into Chromium.

This depends on MB changes in https://chromium-review.googlesource.com/c/616284 

BUG= 752083 , 755973

Change-Id: If91035aaa07cf7447dd5d09f8b81048c041a793e
Reviewed-on: https://chromium-review.googlesource.com/616736
Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Commit-Queue: Henrik Kjellander <kjellander@chromium.org>

[modify] https://crrev.com/75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74/masters/master.chromium.webrtc/slaves.cfg
[modify] https://crrev.com/75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74/scripts/slave/recipe_modules/chromium_tests/chromium_webrtc_fyi.py
[modify] https://crrev.com/75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74/masters/master.chromium.webrtc.fyi/master_builders_cfg.py
[modify] https://crrev.com/75e24d6c5de9153dfe7cdf9e45ae15f920c1ba74/masters/master.chromium.webrtc.fyi/slaves.cfg

We now have the new bots and they are working as intended (i.e. building with is_component_build=true).