[Android] Ignore exceptions when provision attempts to write local props.

build/android/provision_devices.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2013 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.
 
 """Provisions Android devices with settings required for bots.
 
 Usage:
   ./provision_devices.py [-d <device serial number>]
@@ skipping 73 matching lines @@
   """Set standard readonly testing device properties prior to reboot."""
   local_props = [
       'ro.monkey=1',
       'ro.test_harness=1',
       'ro.audio.silent=1',
       'ro.setupwizard.mode=DISABLED',
       ]
   if not is_perf:
     local_props.append('%s=all' % android_commands.JAVA_ASSERT_PROPERTY)
     local_props.append('debug.checkjni=1')
-  device.WriteFile(
-      constants.DEVICE_LOCAL_PROPERTIES_PATH,
-      '\n'.join(local_props), as_root=True)
-  # Android will not respect the local props file if it is world writable.
-  device.RunShellCommand(
-      'chmod 644 %s' % constants.DEVICE_LOCAL_PROPERTIES_PATH,
-      as_root=True)
+  try:
+    device.WriteFile(
+        constants.DEVICE_LOCAL_PROPERTIES_PATH,
+        '\n'.join(local_props), as_root=True)
+    # Android will not respect the local props file if it is world writable.
+    device.RunShellCommand(
+        'chmod 644 %s' % constants.DEVICE_LOCAL_PROPERTIES_PATH,
+        as_root=True)
+  except device_errors.CommandFailedError as e:
+    logging.warning(str(e))
 
   # LOCAL_PROPERTIES_PATH = '/data/local.prop'
 
 
 def WipeDeviceData(device):
   """Wipes data from device, keeping only the adb_keys for authorization.
 
   After wiping data on a device that has been authorized, adb can still
   communicate with the device, but after reboot the device will need to be
   re-authorized because the adb keys file is stored in /data/misc/adb/.
@@ skipping 113 matching lines @@
 
   if args:
     print >> sys.stderr, 'Unused args %s' % args
     return 1
 
   ProvisionDevices(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))