[Android] DeviceUtils change to make Install work without md5 binary.

build/android/pylib/utils/md5sum.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.
 
 import collections
 import logging
 import os
 import tempfile
 import types
 
@@ skipping 15 matching lines @@
   """Calculates the MD5 sum value for all items in |paths|.
 
   Args:
     paths: A list of host paths to md5sum.
   Returns:
     A list of named tuples with 'hash' and 'path' attributes.
   """
   if isinstance(paths, basestring):
     paths = [paths]
 
+  md5sum_bin_host_path = os.path.join(
+      constants.GetOutDirectory(), 'md5sum_bin_host')
+  if not os.path.exists(md5sum_bin_host_path):
+    raise OSError('File not built: %s' % md5sum_bin_host_path)
+
   out = cmd_helper.GetCmdOutput(
-      [os.path.join(constants.GetOutDirectory(), 'md5sum_bin_host')] +
-          [p for p in paths])
+      [md5sum_bin_host_path] + [p for p in paths])
   return [HashAndPath(*l.split(None, 1)) for l in out.splitlines()]
 
 
 def CalculateDeviceMd5Sums(paths, device):
   """Calculates the MD5 sum value for all items in |paths|.
 
   Args:
     paths: A list of device paths to md5sum.
   Returns:
     A list of named tuples with 'hash' and 'path' attributes.
   """
   if isinstance(paths, basestring):
     paths = [paths]
 
+  md5sum_dist_path = os.path.join(constants.GetOutDirectory(), 'md5sum_dist')
+  if not os.path.exists(md5sum_dist_path):
+    raise OSError('File not built: %s' % md5sum_dist_path)
+
   if not device.FileExists(MD5SUM_DEVICE_BIN_PATH):
-    device.adb.Push(
-        os.path.join(constants.GetOutDirectory(), 'md5sum_dist'),
-        MD5SUM_DEVICE_LIB_PATH)
+    device.adb.Push(md5sum_dist_path, MD5SUM_DEVICE_LIB_PATH)
 
   out = []
 
   with tempfile.NamedTemporaryFile() as md5sum_script_file:
     with device_temp_file.DeviceTempFile(
         device.adb) as md5sum_device_script_file:
       device_pie_wrapper = device.GetDevicePieWrapper()
       md5sum_script = (
           MD5SUM_DEVICE_SCRIPT_FORMAT.format(
               path=p, md5sum_lib=MD5SUM_DEVICE_LIB_PATH,
               device_pie_wrapper=device_pie_wrapper,
               md5sum_bin=MD5SUM_DEVICE_BIN_PATH)
           for p in paths)
       md5sum_script_file.write('; '.join(md5sum_script))
       md5sum_script_file.flush()
       device.adb.Push(md5sum_script_file.name, md5sum_device_script_file.name)
       out = device.RunShellCommand(['sh', md5sum_device_script_file.name])
 
   return [HashAndPath(*l.split(None, 1)) for l in out if l]