Remove -no-audio option for headless Android emulators.

build/android/pylib/utils/emulator.py

 # 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.
 
   Emulator: The class provides the methods to launch/shutdown the emulator with
             the android virtual device named 'avd_armeabi' .
 """
 
@@ skipping 399 matching lines @@
     (self.device_serial, port) = self._DeviceName()
     self.ResizeAndWipeAvd(storage_size=self.storage_size)
     emulator_command = [
         self.emulator,
         # Speed up emulator launch by 40%.  Really.
         '-no-boot-anim',
         ]
     if self.headless:
       emulator_command.extend([
         '-no-skin',
-        '-no-audio',
         '-no-window'
         ])
     else:
       emulator_command.extend([
           '-gpu', 'on'
         ])
     emulator_command.extend([
         # Use a familiar name and port.
         '-avd', self.avd_name,
         '-port', str(port),
@@ skipping 80 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)