[android] Fix suite error message.

build/android/pylib/gtest/dispatch.py

 # 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.
 
 """Dispatches GTests."""
 
 import copy
 import fnmatch
 import logging
 import os
@@ skipping 44 matching lines @@
     all_test_suites = gtest_config.STABLE_TEST_SUITES
 
   # List of tuples (suite_name, suite_path)
   qualified_test_suites = map(GetQualifiedSuite, all_test_suites)
 
   for t, q in qualified_test_suites:
     if not os.path.exists(q):
       raise Exception('Test suite %s not found in %s.\n'
                       'Supported test suites:\n %s\n'
                       'Ensure it has been built.\n' %
-                      (t, q, gtest_config.STABLE_TEST_SUITES))
+                      (t, q, [s.name for s in gtest_config.STABLE_TEST_SUITES]))
   return qualified_test_suites
 
 
 def GetTestsFromDevice(runner):
   """Get a list of tests from a device, excluding disabled tests.
 
   Args:
     runner: a TestRunner.
   Returns:
     All non-disabled tests on the device.
@@ skipping 154 matching lines @@
     test_options.test_suite = suite_path
     test_results, test_exit_code = _RunATestSuite(test_options, suite_name)
     results.AddTestRunResults(test_results)
     if test_exit_code and exit_code != constants.ERROR_EXIT_CODE:
       exit_code = test_exit_code
 
   if options.use_xvfb:
     framebuffer.Stop()
 
   return (results, exit_code)