Add a snapshot of flutter/engine/src/build to our sdk

build/android/pylib/device/commands/install_commands.py

Index: build/android/pylib/device/commands/install_commands.py
diff --git a/build/android/pylib/device/commands/install_commands.py b/build/android/pylib/device/commands/install_commands.py
new file mode 100644
index 0000000000000000000000000000000000000000..58c56ccb1be2900515c8d848879600c4b98e8385
--- /dev/null
+++ b/build/android/pylib/device/commands/install_commands.py
@@ -0,0 +1,51 @@
+# 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
+
+from pylib import constants
+
+BIN_DIR = '%s/bin' % constants.TEST_EXECUTABLE_DIR
+_FRAMEWORK_DIR = '%s/framework' % constants.TEST_EXECUTABLE_DIR
+
+_COMMANDS = {
+  'unzip': 'org.chromium.android.commands.unzip.Unzip',
+}
+
+_SHELL_COMMAND_FORMAT = (
+"""#!/system/bin/sh
+base=%s
+export CLASSPATH=$base/framework/chromium_commands.jar
+exec app_process $base/bin %s $@
+""")
+
+
+def Installed(device):
+  return (all(device.FileExists('%s/%s' % (BIN_DIR, c)) for c in _COMMANDS)
+          and device.FileExists('%s/chromium_commands.jar' % _FRAMEWORK_DIR))
+
+def InstallCommands(device):
+  if device.IsUserBuild():
+    raise Exception('chromium_commands currently requires a userdebug build.')
+
+  chromium_commands_jar_path = os.path.join(
+      constants.GetOutDirectory(), constants.SDK_BUILD_JAVALIB_DIR,
+      'chromium_commands.dex.jar')
+  if not os.path.exists(chromium_commands_jar_path):
+    raise Exception('%s not found. Please build chromium_commands.'
+                    % chromium_commands_jar_path)
+
+  device.RunShellCommand(['mkdir', BIN_DIR, _FRAMEWORK_DIR])
+  for command, main_class in _COMMANDS.iteritems():
+    shell_command = _SHELL_COMMAND_FORMAT % (
+        constants.TEST_EXECUTABLE_DIR, main_class)
+    shell_file = '%s/%s' % (BIN_DIR, command)
+    device.WriteFile(shell_file, shell_command)
+    device.RunShellCommand(
+        ['chmod', '755', shell_file], check_return=True)
+
+  device.adb.Push(
+      chromium_commands_jar_path,
+      '%s/chromium_commands.jar' % _FRAMEWORK_DIR)
+