Android: Fix error message when trying to run gtest that is not built

build/android/pylib/gtest/gtest_test_instance.py

 # 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 logging
 import os
 import re
 import sys
 import tempfile
 
@@ skipping 142 matching lines @@
       }
       if self._suite in RUN_IN_SUB_THREAD_TEST_SUITES:
         self._extras[_EXTRA_RUN_IN_SUB_THREAD] = 1
       if self._suite in BROWSER_TEST_SUITES:
         self._extras[_EXTRA_SHARD_SIZE_LIMIT] = 1
         self._extras[EXTRA_SHARD_NANO_TIMEOUT] = int(1e9 * self._shard_timeout)
         self._shard_timeout = 900
 
     if not os.path.exists(self._exe_path):
       self._exe_path = None
-    if not apk_path and not self._exe_path:
+    if not self._apk_helper and not self._exe_path:
       error_func('Could not find apk or executable for %s' % self._suite)
 
     self._data_deps = []
     if args.test_filter:
       self._gtest_filter = args.test_filter
     elif args.test_filter_file:
       with open(args.test_filter_file, 'r') as f:
         self._gtest_filter = ':'.join(l.strip() for l in f)
     else:
       self._gtest_filter = None
@@ skipping 181 matching lines @@
     return self._apk_helper and self._apk_helper.GetInstrumentationName()
 
   @property
   def shard_timeout(self):
     return self._shard_timeout
 
   @property
   def suite(self):
     return self._suite