Do not reboot emulator.

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 b1769ee2375391bcac39f44d79e47a3ebecef610..3b0c30923ab4a46e00817f6f64683f4d89ea60df 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -84,7 +84,12 @@ def RebootDevices():
   # which might not exist in this checkout.
   if bb_utils.TESTING:
     return
-  devices = android_commands.GetAttachedDevices()
+  all_devices = android_commands.GetAttachedDevices()

[frankf, 2013/07/19 19:20:31]

Instead of adding all this extra logic here, combine Get{Emulator,
AttachedDevices, AttachedOfflineDevices) into one method with default
parameters:

GetAttachedDevices(hardware=True, emulator=True, offline=False)

[Isaac (away), 2013/07/19 21:31:29]

Yeah I agree w/ frank.  Let's push this logic into pylib.

[navabi, 2013/07/19 23:03:44]

Done. Good idea.

+
+  def IsRealDevice(device):
+    return device not in android_commands.GetEmulators()
+
+  devices = filter(IsRealDevice, all_devices)
   print 'Rebooting: %s' % devices
   if devices:
     pool = multiprocessing.Pool(len(devices))