Do not reboot emulator.

build/android/pylib/utils/emulator.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provides an interface to start and stop Android emulator.
 
 Assumes system environment ANDROID_NDK_ROOT has been set.
 
@@ skipping 29 matching lines @@
   """Emulator failed to launch."""
   pass
 
 def _KillAllEmulators():
   """Kill all running emulators that look like ones we started.
 
   There are odd 'sticky' cases where there can be no emulator process
   running but a device slot is taken.  A little bot trouble and and
   we're out of room forever.
   """
-  emulators = android_commands.GetEmulators()
+  emulators = android_commands.GetAttachedDevices(hardware=False, emulator=True,
+                                                  offline=False)
   if not emulators:
     return
   for emu_name in emulators:
     cmd_helper.RunCmd(['adb', '-s', emu_name, 'emu', 'kill'])
   logging.info('Emulator killing is async; give a few seconds for all to die.')
   for i in range(5):
-    if not android_commands.GetEmulators():
+    if not android_commands.GetAttachedDevices(hardware=False, emulator=True,
+                                               offline=False):
       return
     time.sleep(1)
 
 
 def DeleteAllTempAVDs():
   """Delete all temporary AVDs which are created for tests.
 
   If the test exits abnormally and some temporary AVDs created when testing may
   be left in the system. Clean these AVDs.
   """
@@ skipping 23 matching lines @@
     Cycling through a port start position helps make us resilient."""
     ports = range(cls._port_min, cls._port_max, 2)
     n = cls._port_current_index
     cls._port_current_index = (n + 1) % len(ports)
     return ports[n:] + ports[:n]
 
 
 def _GetAvailablePort():
   """Returns an available TCP port for the console."""
   used_ports = []
-  emulators = android_commands.GetEmulators()
+  emulators = android_commands.GetAttachedDevices(hardware=False, emulator=True,
+                                                  offline=False)
   for emulator in emulators:
     used_ports.append(emulator.split('-')[1])
   for port in PortPool.port_range():
     if str(port) not in used_ports:
       return port
 
 
 def LaunchEmulators(emulator_count, abi, wait_for_boot=True):
   """Launch multiple emulators and wait for them to boot.
 
@@ skipping 250 matching lines @@
     logging.critical('emulator _ShutdownOnSignal')
     for sig in self._SIGNALS:
       signal.signal(sig, signal.SIG_DFL)
     self.Shutdown()
     raise KeyboardInterrupt  # print a stack
 
   def _InstallKillHandler(self):
     """Install a handler to kill the emulator when we exit unexpectedly."""
     for sig in self._SIGNALS:
       signal.signal(sig, self._ShutdownOnSignal)