https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Builder is happy.
https://build.chromium.org/p/chromium.chromiumos/builders/ChromiumOS%20amd64-generic%20Compile/builds/38117 is happy.

Can you paste your error?

Probably can be fixed by sudo apt-get install libva-dev ?

In that case, is the install build deps sh script up to date? dcheng, maybe you just need to rerun that? (If not, we should update the script)

I already tried installing libva-dev to see if that would make the error go away =) I suspect we'll need some tweak to the build flags.

The error is:
../../media/gpu/jpeg_decode_accelerator_unittest.cc:151:2: error: The JpegDecodeAccelerator is not supported on this platform.
#error The JpegDecodeAccelerator is not supported on this platform.
 ^

Sorry about this - I am ooo until next Monday JST but will look at this issue first thing. It seems like an #ifdef needs to be updated.

Been able to reproduce the error. It is not the Chrome build itself that fails, but the jpeg_decode_accelerator_unittest.

This particular flavor of Chrome OS does not support hardware JPEG and video decode acceleration (since neither libva nor v4l2 are used), so that test would not be able to run anyway. But getting a compilation error like this is clearly not very graceful.

I have submitted https://chromium-review.googlesource.com/c/612924 which should fix this. Reviews appreciated, thanks!

 Issue 756485  has been merged into this issue.

https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Ozone%20Builder is also unhappy.

Yah - that bot has been broken for a week, since https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Ozone%20Builder/builds/54289 

(for some reason, Sheriff-o-matic doesn't report it, but build.chromium.org does + Sheriff-Chromium, so other sheriffs don't go hunting for this bug)

https://chromium-review.googlesource.com/c/chromium/src/+/627958 should address this issue at the build level. The JDA unittest will not be built on platforms that do not support it.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3244bc11b60f7478fc2adf93d85b21263470f395

commit 3244bc11b60f7478fc2adf93d85b21263470f395
Author: Hirokazu Honda <hiroh@chromium.org>
Date: Thu Aug 24 07:51:22 2017

Create a jpeg decoder instance by GpuJDAFactoryProvider in JDA unittest

JDA unittest has created a jpeg decoder instance by a different method from
GpuJpegDecodeAcceleratorFactoryProvider.
It should rely on GpuJDAFactoryProvider::GetAcceleratorFactories().

BUG= chromium:746822 
BUG= chromium:754442 
TEST=JDA unittest on elm and an intel device.

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Id72291b2220e324cadb4241a2a6f8288ba579295
Reviewed-on: https://chromium-review.googlesource.com/620470
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Wu-Cheng Li <wuchengli@chromium.org>
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496975}
[modify] https://crrev.com/3244bc11b60f7478fc2adf93d85b21263470f395/media/gpu/BUILD.gn
[modify] https://crrev.com/3244bc11b60f7478fc2adf93d85b21263470f395/media/gpu/jpeg_decode_accelerator_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8ad2427d7004609cbe998b947653dab41a464c72

commit 8ad2427d7004609cbe998b947653dab41a464c72
Author: Alexandre Courbot <acourbot@chromium.org>
Date: Fri Aug 25 14:04:55 2017

media/gpu: restrict accelerated HW test to supported platforms

HW accelerated tests are not supported on all Chrome OS platforms.
Rather their availability is defined by the presence of a supported
HW-accelerated API (VA-API or V4L2). Update the build conditions to
reflect that fact.

BUG= chromium:754442 
TEST=verified that VDA, VDE and JDA tests build on supported platforms
and are omitted on others.

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I7b8698f5b9d0be48368e872c0375b8a6609f9b86
Reviewed-on: https://chromium-review.googlesource.com/627958
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497397}
[modify] https://crrev.com/8ad2427d7004609cbe998b947653dab41a464c72/BUILD.gn
[modify] https://crrev.com/8ad2427d7004609cbe998b947653dab41a464c72/media/gpu/BUILD.gn

Marking as fixed since buildsystem-level fix has been merged. In addition hiroh@'s https://chromium-review.googlesource.com/c/chromium/src/+/620470 should also prevent compilation failures should that file be compiled on platforms not supporting JPEG acceleration again.