DeviceUtils: Fix SU command for pre-M devices

build/android/devil/android/device_utils.py

 # Copyright 2014 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 a variety of device interactions based on adb.
 
 Eventually, this will be based on adb_wrapper.
 """
 # pylint: disable=unused-argument
 
@@ skipping 276 matching lines @@
             timeout=self._default_timeout if timeout is DEFAULT else timeout,
             retries=self._default_retries if retries is DEFAULT else retries)
         self._cache['needs_su'] = True
       except device_errors.AdbCommandFailedError:
         self._cache['needs_su'] = False
     return self._cache['needs_su']
 
   def _Su(self, command):
     if self.build_version_sdk >= version_codes.MARSHMALLOW:
       return 'su 0 %s' % command
-    return 'su -c %s' % command
+    return 'su -c %s' % cmd_helper.SingleQuote(command)
 
   @decorators.WithTimeoutAndRetriesFromInstance()
   def EnableRoot(self, timeout=None, retries=None):
     """Restarts adbd with root privileges.
 
     Args:
       timeout: timeout in seconds
       retries: number of retries
 
     Raises:
@@ skipping 1659 matching lines @@
     if ('android.permission.WRITE_EXTERNAL_STORAGE' in permissions
         and 'android.permission.READ_EXTERNAL_STORAGE' not in permissions):
       permissions.append('android.permission.READ_EXTERNAL_STORAGE')
     cmd = ';'.join('pm grant %s %s' %(package, p) for p in permissions)
     if cmd:
       output = self.RunShellCommand(cmd)
       if output:
         logging.warning('Possible problem when granting permissions. Blacklist '
                         'may need to be updated.')
         logging.warning(output)