GetBatteryInfo() battery automation hook.

chrome/test/functional/PYAUTO_TESTS

 # Copyright (c) 2011 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.
 #
 # This file lists the pyauto tests that run as a part of the functional test
 # suite.
 #
 # Tests can be enabled on a per-platform basis. Tests not listed here will
 # not be run.
 #
@@ skipping 135 matching lines @@
       '-passwords.PasswordTest.testNeverSavePasswords',
     ],
 
     # ChromeOS is linux, but note that this section does not include the
     # entries in the linux section above.
     # These tests use the named automation interface to control the
     # primary chrome on ChromeOS.
     'chromeos': [
       'chromeos_basic',
       'chromeos_network',
+      'chromeos_power',
       '-chromeos_basic.ChromeosBasic.testScreenLocker',
 
       # crbug.com/42823
       '-bookmark_bar.BookmarkBarTest.testBookmarkBarVisible',
       # you cannot resize browser window on chromeos
       '-browser.BrowserTest.testWindowResize',
       # no codesign verification on chromeos
       '-codesign',
       # crosbug.com/9499
       '-crash_reporter.CrashReporterTest.testRendererCrash',
@@ skipping 104 matching lines @@
     ],
 
     'chromeos': [
       # Exclusions that have not been narrowed to other categories yet.
       # crosbug.com/12653
       '-translate',
     ],
   },
 
 }