[Android] fix the pylib/base/shard.py unittest.

The unittest was broken by a naming nit fix.

BUG=None
TEST=pylib/base/shard_unittest.py

Review URL: https://codereview.chromium.org/12327025

git-svn-id: http://src.chromium.org/svn/trunk/src/build@183820 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/pylib/base/shard_unittest.py

@@ -52,7 +52,7 @@ class TestWorker(unittest.TestCase):
     worker = shard._Worker(mock_runner, tests, results, retry)
     worker.start()
     worker.join()
-    worker.Reraise()
+    worker.ReraiseIfException()
     return (results, retry)
 
   def testRun(self):