GPU Linux Builder fails on "generate_build_files".
The error is exactly the same in the 3 first failing builds:
=== LOG STARTS ===
Traceback (most recent call last):
  File "/b/c/b/linux/src/tools/mb/mb.py", line 61, in Main
    ret = self.args.func()
  File "/b/c/b/linux/src/tools/mb/mb.py", line 299, in CmdGen
    return self.RunGNGen(vals)
  File "/b/c/b/linux/src/tools/mb/mb.py", line 885, in RunGNGen
    ', '.join(runtime_deps_targets))
MBErr: did not generate any of browser_tests.runtime_deps
step returned non-zero exit code: 1
=== LOG ENDS ===

The first failing build is at https://codereview.chromium.org/2835893002, which seems unrelated.

I presume this is Infra issue.