[Android] Implement gtest and local in platform mode.

build/android/pylib/base/test_collection.py

 # Copyright 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.
 
 import threading
 
 class TestCollection(object):
   """A threadsafe collection of tests.
 
   Args:
@@ skipping 26 matching lines @@
         # Check which of the two conditions triggered the signal.
         if self._tests_in_progress == 0:
           return None
         try:
           return self._tests.pop(0)
         except IndexError:
           # Another thread beat us to the available test, wait again.
           self._item_available_or_all_done.clear()
 
   def add(self, test):
-    """Add an test to the collection.
+    """Add a test to the collection.
 
     Args:
       test: A test to add.
     """
     with self._lock:
       self._tests.append(test)
       self._item_available_or_all_done.set()
       self._tests_in_progress += 1
 
   def test_completed(self):
@@ skipping 13 matching lines @@
       yield r
 
   def __len__(self):
     """Return the number of tests currently in the collection."""
     return len(self._tests)
 
   def test_names(self):
     """Return a list of the names of the tests currently in the collection."""
     with self._lock:
       return list(t.test for t in self._tests)