[Android] Enable running uiautomator tests.

build/android/pylib/utils/apk_helper.py

Index: build/android/pylib/utils/apk_helper.py
diff --git a/build/android/pylib/utils/apk_helper.py b/build/android/pylib/utils/apk_helper.py
new file mode 100644
index 0000000000000000000000000000000000000000..fbcc595738f7664275e7410b3f5dba7d6c1db46b
--- /dev/null
+++ b/build/android/pylib/utils/apk_helper.py
@@ -0,0 +1,21 @@
+# Copyright (c) 2013 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.
+
+"""Module containing utilities for apk packages."""
+
+import re
+
+from pylib import cmd_helper
+
+
+def GetPackageName(apk_path):
+  """Returns the package name of the apk."""
+  aapt_output = cmd_helper.GetCmdOutput(
+      ['aapt', 'dump', 'badging', apk_path]).split('\n')
+  package_name_re = re.compile(r'package: .*name=\'(\S*)\'')
+  for line in aapt_output:
+    m = package_name_re.match(line)
+    if m:
+      return m.group(1)
+  raise Exception('Failed to determine package name of %s' % apk_path)