[Android] Make SetJavaAsserts return True if a restart is required.

build/android/pylib/device/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=W0613
 
@@ skipping 671 matching lines @@
   @decorators.WithTimeoutAndRetriesFromInstance()
   def SetJavaAsserts(self, enabled, timeout=None, retries=None):
     """Enables or disables Java asserts.
 
     Args:
       enabled: A boolean indicating whether Java asserts should be enabled
                or disabled.
       timeout: timeout in seconds
       retries: number of retries
 
+    Returns:
+      True if the device-side property changed and a restart is required as a
+      result, False otherwise.
+
     Raises:
       CommandTimeoutError on timeout.
     """
-    self.old_interface.SetJavaAssertsEnabled(enabled)
+    return self.old_interface.SetJavaAssertsEnabled(enabled)
 
   @decorators.WithTimeoutAndRetriesFromInstance()
   def GetProp(self, property_name, timeout=None, retries=None):
     """Gets a property from the device.
 
     Args:
       property_name: A string containing the name of the property to get from
                      the device.
       timeout: timeout in seconds
       retries: number of retries
@@ skipping 153 matching lines @@
       A Parallelizer operating over |devices|.
     """
     if not devices or len(devices) == 0:
       devices = pylib.android_commands.GetAttachedDevices()
     parallelizer_type = (parallelizer.Parallelizer if async
                          else parallelizer.SyncParallelizer)
     return parallelizer_type([
         d if isinstance(d, DeviceUtils) else DeviceUtils(d)
         for d in devices])