Allow empty line when parsing properties files.

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=unused-argument
 
@@ skipping 1028 matching lines @@
 
     Returns:
       True if the device-side property changed and a restart is required as a
       result, False otherwise.
 
     Raises:
       CommandTimeoutError on timeout.
     """
     def find_property(lines, property_name):
       for index, line in enumerate(lines):
+        if line.strip() == '':
+          continue
         key, value = (s.strip() for s in line.split('=', 1))
         if key == property_name:
           return index, value
       return None, ''
 
     new_value = 'all' if enabled else ''
 
     # First ensure the desired property is persisted.
     try:
       properties = self.ReadFile(
@@ skipping 305 matching lines @@
     Returns:
       A Parallelizer operating over |devices|.
     """
     if not devices:
       devices = adb_wrapper.AdbWrapper.GetDevices()
     devices = [d if isinstance(d, cls) else cls(d) for d in devices]
     if async:
       return parallelizer.Parallelizer(devices)
     else:
       return parallelizer.SyncParallelizer(devices)