[Android] Add a configurable environment for devil/. (RELAND)

build/android/devil_chromium.py

Index: build/android/devil_chromium.py
diff --git a/build/android/devil_chromium.py b/build/android/devil_chromium.py
new file mode 100644
index 0000000000000000000000000000000000000000..10ccbf491f19de46d38f02965293009cf5702237
--- /dev/null
+++ b/build/android/devil_chromium.py
@@ -0,0 +1,50 @@
+# Copyright 2015 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.
+
+"""Configures devil for use in chromium."""
+
+import os
+
+from devil import devil_env
+from pylib import constants
+
+
+_DEVIL_CONFIG = os.path.abspath(os.path.dirname(__file__),
+                                'devil_chromium.json')
+
+
+def Initialize(output_directory=None, custom_deps=None):
+  """Initializes devil with chromium's binaries and third-party libraries.
+
+  This includes:
+    - the android SDK ("android_sdk")
+    - host & device forwarder binaries ("forwarder_device" and "forwarder_host")
+    - host & device md5sum binaries ("md5sum_device" and "md5sum_host"), and
+    - pymock ("pymock")
+
+  Args:
+    output_directory: An optional path to the output directory. If not set,
+      defaults to out/<build type> (e.g., out/Debug)
+    custom_deps: An optional dictionary containing dependencies that should
+      be specified instead of or in addition
+  """
+
+  if not output_directory:
+    output_directory = constants.GetOutDirectory()
+
+  output_binary = lambda p: os.path.join(output_directory, p)
+  devil_dynamic_deps = {
+    'forwarder_device': [output_binary('forwarder_dist')],
+    'forwarder_host': [output_binary('host_forwarder')],
+    'md5sum_device': [output_binary('md5sum_dist')],
+    'md5sum_host': [output_binary('md5sum_bin_host')],
+  }
+
+  if custom_deps:
+    devil_dynamic_deps.update(custom_deps)
+
+  devil_dynamic_config = devil_env.GenerateDynamicConfig(devil_dynamic_deps)
+  devil_env.config.Initialize(configs=[devil_dynamic_config],
+                              config_files=[_DEVIL_CONFIG])
+