[Android] Fix checksum handling when md5sum generates unexpected output.

build/android/pylib/utils/md5sum_test.py

 #!/usr/bin/env python
 # 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.
 
 import os
 import sys
 import unittest
 
 from pylib import cmd_helper
@@ skipping 159 matching lines @@
       self.assertEquals(2, len(out))
       self.assertEquals('0123456789abcdeffedcba9876543210', out[0].hash)
       self.assertEquals('/storage/emulated/legacy/test/file0.dat', out[0].path)
       self.assertEquals('123456789abcdef00fedcba987654321', out[1].hash)
       self.assertEquals('/storage/emulated/legacy/test/file1.dat', out[1].path)
       device.adb.Push.assert_called_once_with(
           '/tmp/test/script/file.sh', '/data/local/tmp/test/script/file.sh')
       device.RunShellCommand.assert_called_once_with(
           ['sh', '/data/local/tmp/test/script/file.sh'])
 
+  def testCalculateDeviceMd5Sums_singlePath_linkerWarning(self):
+    # See crbug/479966
+    test_path = '/storage/emulated/legacy/test/file.dat'
+
+    device = mock.NonCallableMock()
+    device.adb = mock.NonCallableMock()
+    device.adb.Push = mock.Mock()
+    device_md5sum_output = [
+        'WARNING: linker: /data/local/tmp/md5sum/md5sum_bin: '
+            'unused DT entry: type 0x1d arg 0x15db',
+        '0123456789abcdeffedcba9876543210 '
+            '/storage/emulated/legacy/test/file.dat',
+    ]
+    device.RunShellCommand = mock.Mock(return_value=device_md5sum_output)
+
+    mock_temp_file = mock.mock_open()
+    mock_temp_file.return_value.name = '/tmp/test/script/file.sh'
+
+    mock_device_temp_file = mock.mock_open()
+    mock_device_temp_file.return_value.name = (
+        '/data/local/tmp/test/script/file.sh')
+
+    with mock.patch('tempfile.NamedTemporaryFile', new=mock_temp_file), (
+         mock.patch('pylib.utils.device_temp_file.DeviceTempFile',
+                    new=mock_device_temp_file)):
+      out = md5sum.CalculateDeviceMd5Sums(test_path, device)
+      self.assertEquals(1, len(out))
+      self.assertEquals('0123456789abcdeffedcba9876543210', out[0].hash)
+      self.assertEquals('/storage/emulated/legacy/test/file.dat', out[0].path)
+      device.adb.Push.assert_called_once_with(
+          '/tmp/test/script/file.sh', '/data/local/tmp/test/script/file.sh')
+      device.RunShellCommand.assert_called_once_with(
+          ['sh', '/data/local/tmp/test/script/file.sh'])
+
 
 if __name__ == '__main__':
   unittest.main(verbosity=2)