log:
https://luci-logdog.appspot.com/v/?s=chromeos/buildbucket/cr-buildbucket.appspot.com/8941224560046363824/+/steps/AndroidMetadata/0/stdout
(the error log is attached at the end of this)

This is due to recent CL: http://crrev.com/c/1130456, although we're not sure why it's trying to resolve the chromeos-chrome::chromiumos dependency.

(dependency required by "virtual/target-chromium-os-1-r101::chromiumos" [ebuild])
(dependency required by "virtual/target-chrome-os-1-r19::chromeos" [ebuild])

#See below for full log

I'll add chrome_internal to make.defaults for eve-arcnext for now.

----
01:07:26: INFO: RunCommand: /b/swarming/w/ir/cache/cbuild/repository/chromite/bin/cros_sdk -- emerge-eve-arcnext -p --cols --quiet --root /var/empty -e virtual/target-os in /b/swarming/w/ir/cache/cbuild/repository
01:07:55: ERROR: Traceback (most recent call last):
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/generic_stages.py", line 697, in Run
    self.PerformStage()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/android_stages.py", line 158, in PerformStage
    versions, branches = self._UpdateBoardDictsForAndroidBuildInfo()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/stages/android_stages.py", line 133, in _UpdateBoardDictsForAndroidBuildInfo
    version = self._run.DetermineAndroidVersion(boards=[board])
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/cbuildbot_run.py", line 984, in FuncWrapper
    return result(*args, **kwargs)
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/cbuildbot_run.py", line 893, in DetermineAndroidVersion
    package = self.DetermineAndroidPackage(board)
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/cbuildbot/cbuildbot_run.py", line 866, in DetermineAndroidPackage
    packages = portage_util.GetPackageDependencies(board, 'virtual/target-os')
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/lib/portage_util.py", line 1827, in GetPackageDependencies
    capture_output=True).output.splitlines()
  File "/b/swarming/w/ir/cache/cbuild/repository/chromite/lib/cros_build_lib.py", line 669, in RunCommand
    raise RunCommandError(msg, cmd_result)
RunCommandError: return code: 1; command: /b/swarming/w/ir/cache/cbuild/repository/chromite/bin/cros_sdk -- emerge-eve-arcnext -p --cols --quiet --root /var/empty -e virtual/target-os
!!! The ebuild selected to satisfy "chromeos-base/chromeos-chrome" for /var/empty/ has unmet requirements.
- chromeos-base/chromeos-chrome-69.0.3489.0_rc-r1::chromiumos USE="accessibility authpolicy autotest build_native_assistant build_tests buildcheck cfi chrome_debug chrome_remoting clang cups debug_fission evdev_gestures fonts gold highdpi libcxx nacl opengles runhooks smbprovider thinlto v4l2_codec vaapi xkbcommon -afdo_use -app_shell -asan -chrome_debug_tests -chrome_internal -chrome_media -clang_tidy -component_build -goma -hardfp -internal_gles_conform -jumbo -lld -mojo (-neon) -opengl -v4lplugin -verbose -vtable_verify" ABI_X86="64" OZONE_PLATFORM="default_gbm gbm -caca -cast -default_caca -default_cast -default_egltest -default_test -egltest -test" OZONE_PLATFORM_DEFAULT="gbm -caca -cast -egltest -test"
  The following REQUIRED_USE flag constraints are unsatisfied:
    build_native_assistant? ( chrome_internal )
  The above constraints are a subset of the following complete expression:
    asan? ( clang ) at-most-one-of ( gold lld ) cfi? ( thinlto ) clang_tidy? ( clang ) libcxx? ( clang ) thinlto? ( clang any-of ( gold lld ) ) afdo_use? ( clang ) build_native_assistant? ( chrome_internal ) exactly-one-of ( ozone_platform_default_gbm ozone_platform_default_cast ozone_platform_default_test ozone_platform_default_egltest ozone_platform_default_caca )
(dependency required by "virtual/chromeos-interface-1-r5::chromiumos[-chromeless_tty]" [ebuild])
(dependency required by "virtual/target-chromium-os-1-r101::chromiumos" [ebuild])
(dependency required by "virtual/target-chrome-os-1-r19::chromeos" [ebuild])
(dependency required by "virtual/target-os-1.5-r1::chromeos" [ebuild])
(dependency required by "virtual/target-os" [argument])
cmd=['/b/swarming/w/ir/cache/cbuild/repository/chromite/bin/cros_sdk', '--', u'emerge-eve-arcnext', '-p', '--cols', '--quiet', '--root', '/var/empty', '-e', 'virtual/target-os'], cwd=/b/swarming/w/ir/cache/cbuild/repository

01:07:55: INFO: Translating result return code: 1; command: /b/swarming/w/ir/cache/cbuild/repository/chromite/bin/cros_sdk -- emerge-eve-arcnext -p --cols --quiet --root /var/empty -e virtual/target-os
!!! The ebuild selected to satisfy "chromeos-base/chromeos-chrome" for /var/empty/ has unmet requirements.
- chromeos-base/chromeos-chrome-69.0.3489.0_rc-r1::chromiumos USE="accessibility authpolicy autotest build_native_assistant build_tests buildcheck cfi chrome_debug chrome_remoting clang cups debug_fission evdev_gestures fonts gold highdpi libcxx nacl opengles runhooks smbprovider thinlto v4l2_codec vaapi xkbcommon -afdo_use -app_shell -asan -chrome_debug_tests -chrome_internal -chrome_media -clang_tidy -component_build -goma -hardfp -internal_gles_conform -jumbo -lld -mojo (-neon) -opengl -v4lplugin -verbose -vtable_verify" ABI_X86="64" OZONE_PLATFORM="default_gbm gbm -caca -cast -default_caca -default_cast -default_egltest -default_test -egltest -test" OZONE_PLATFORM_DEFAULT="gbm -caca -cast -egltest -test"
  The following REQUIRED_USE flag constraints are unsatisfied:
    build_native_assistant? ( chrome_internal )
  The above constraints are a subset of the following complete expression:
    asan? ( clang ) at-most-one-of ( gold lld ) cfi? ( thinlto ) clang_tidy? ( clang ) libcxx? ( clang ) thinlto? ( clang any-of ( gold lld ) ) afdo_use? ( clang ) build_native_assistant? ( chrome_internal ) exactly-one-of ( ozone_platform_default_gbm ozone_platform_default_cast ozone_platform_default_test ozone_platform_default_egltest ozone_platform_default_caca )
(dependency required by "virtual/chromeos-interface-1-r5::chromiumos[-chromeless_tty]" [ebuild])
(dependency required by "virtual/target-chromium-os-1-r101::chromiumos" [ebuild])
(dependency required by "virtual/target-chrome-os-1-r19::chromeos" [ebuild])
(dependency required by "virtual/target-os-1.5-r1::chromeos" [ebuild])
(dependency required by "virtual/target-os" [argument])