The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ba1f0bf22c49b8e9963f90c929b440382bbb8561

commit ba1f0bf22c49b8e9963f90c929b440382bbb8561
Author: phajdan.jr <phajdan.jr@chromium.org>
Date: Fri May 06 06:39:06 2016

remoting: fix out-of-tree build

See https://groups.google.com/a/chromium.org/d/msg/chromium-dev/3NAXifb84dk/CXSvOfX-NQAJ for context.

BUG= 609422 

Review-Url: https://codereview.chromium.org/1947923002
Cr-Commit-Position: refs/heads/master@{#392017}

[modify] https://crrev.com/ba1f0bf22c49b8e9963f90c929b440382bbb8561/remoting/android/BUILD.gn
[modify] https://crrev.com/ba1f0bf22c49b8e9963f90c929b440382bbb8561/remoting/host/BUILD.gn
[modify] https://crrev.com/ba1f0bf22c49b8e9963f90c929b440382bbb8561/remoting/remoting_options.gni
[modify] https://crrev.com/ba1f0bf22c49b8e9963f90c929b440382bbb8561/remoting/webapp/build_template.gni

As far as I know, this works now?