Don't stop because we couldn't restart usb devices.

build/android/buildbot/bb_device_status_check.py

Index: build/android/buildbot/bb_device_status_check.py
diff --git a/build/android/buildbot/bb_device_status_check.py b/build/android/buildbot/bb_device_status_check.py
index a021bfc892b1136e13951f486db1d70ac02802ad..18598af438802fd95c0aa94988583feeb664ceba 100755
--- a/build/android/buildbot/bb_device_status_check.py
+++ b/build/android/buildbot/bb_device_status_check.py
@@ -292,9 +292,11 @@ def main():
     # Only restart usb if devices are missing
     if set(expected_devices) != set(devices):
       KillAllAdb()
-      if RestartUsb():
-        return 1
       retries = 5
+      if RestartUsb():
+        bb_annotations.PrintWarning()
+        print "USB reset stage failed, continuing anyway."

[bulach, 2013/11/05 18:21:09]

nit: I think the PrintWarning() needs to come after the message, and it should
be single quotes for print..

there was some debate about this return code when it was added, not quite sure
what was the motiviation, but I think your patch is a good thing, there's no
reason not to keep trying, this restart_usb unfortunately is not as
deterministic as it should've been..

+        retries = 0
       while retries:
         time.sleep(1)
         devices = android_commands.GetAttachedDevices()