Android: Add test runner scripts to run content_browsertests.

build/android/pylib/browsertests/test_sharder.py

Index: build/android/pylib/browsertests/test_sharder.py
diff --git a/build/android/pylib/browsertests/test_sharder.py b/build/android/pylib/browsertests/test_sharder.py
new file mode 100644
index 0000000000000000000000000000000000000000..49d3a0577881cbd2bf7577e53f2784af87bf0004
--- /dev/null
+++ b/build/android/pylib/browsertests/test_sharder.py
@@ -0,0 +1,48 @@
+# 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.
+
+from pylib.base import base_test_sharder
+
+import test_runner
+
+class TestSharder(base_test_sharder.BaseTestSharder):
+  """Responsible for sharding the tests on the connected devices."""
+
+  def __init__(self, attached_devices, test_suite, gtest_filter,
+               test_arguments, timeout, cleanup_test_files, tool,
+               build_type):
+    super(TestSharder, self).__init__(attached_devices, build_type)
+    self.test_suite = test_suite
+    self.gtest_filter = gtest_filter or ''
+    self.test_arguments = test_arguments
+    self.timeout = timeout
+    self.cleanup_test_files = cleanup_test_files
+    self.tool = tool
+    self.all_tests = []
+    if not self.gtest_filter:
+      # TODO(nileshagrawal): Add support to get all the tests.
+      raise Exception('You have not specified a test filter.')
+    self.tests = self.all_tests
+
+  def CreateShardedTestRunner(self, device, index):
+    """Creates a suite-specific test runner.
+
+    Args:
+      device: Device serial where this shard will run.
+      index: Index of this device in the pool.
+
+    Returns:
+      A TestRunner object.
+    """
+    device_num = len(self.attached_devices)
+    shard_test_list = self.tests[index::device_num]
+    test_filter = ':'.join(shard_test_list) + self.gtest_filter
+    return test_runner.TestRunner(
+        device,
+        self.test_suite,
+        test_filter,
+        self.test_arguments,
+        self.timeout,
+        self.cleanup_test_files, self.tool, index,
+        self.build_type)