Provision Android devices after the 'device_status_check' step.

build/android/buildbot/bb_device_steps.py

Index: build/android/buildbot/bb_device_steps.py
diff --git a/build/android/buildbot/bb_device_steps.py b/build/android/buildbot/bb_device_steps.py
index 0f2afc6f6628f6134da5f548d8e93fd9442f04b7..6938760ef253757fdf00a3644c72e8a31a5b7632 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -271,6 +271,13 @@ def MainTestWrapper(options):
   buildbot_report.PrintNamedStep('device_status_check')
   RunCmd(['build/android/device_status_check.py'])
 
+  # Provision devices
+  if options.experimental:
+    buildbot_report.PrintNamedStep('provision_devices')
+    target = options.factory_properties.get('target', 'Debug')
+    adb_reboot = CHROME_SRC + ('/out/%s/adb_reboot' % target)
+    RunCmd(['build/android/provision_devices.py', '-a', adb_reboot])
+
   if options.install:
     test_obj = INSTRUMENTATION_TESTS[options.install]
     InstallApk(options, test_obj, print_step=True)