Fix Closure Compiler's compile.py error checking

third_party/closure_compiler/compiler_test.py

 #!/usr/bin/env python
 # 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.
 
 from ast import literal_eval
 import os
 import tempfile
 import unittest
 
 from compile import Checker
 from processor import FileCache, Processor
 
-
 _SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 _SRC_DIR = os.path.join(_SCRIPT_DIR, os.pardir, os.pardir)
 _RESOURCES_DIR = os.path.join(_SRC_DIR, "ui", "webui", "resources", "js")
 _ASSERT_JS = os.path.join(_RESOURCES_DIR, "assert.js")
 _CR_JS = os.path.join(_RESOURCES_DIR, "cr.js")
 _CR_UI_JS = os.path.join(_RESOURCES_DIR, "cr", "ui.js")
 _PROMISE_RESOLVER_JS = os.path.join(_RESOURCES_DIR, "promise_resolver.js")
 _POLYMER_EXTERNS = os.path.join(_SCRIPT_DIR, "externs", "polymer-1.0.js")
 _CHROME_SEND_EXTERNS = os.path.join(_SRC_DIR, "third_party", "closure_compiler",
                                     "externs", "chrome_send.js")
@@ skipping 342 matching lines @@
 """
     args = ['warning_level=VERBOSE']
     self._runCheckerTestExpectError(template % '', 'Missing return',
                                     closure_args=args)
     self._runCheckerTestExpectSuccess(template % 'assertNotReached();',
                                       closure_args=args)
 
 
 if __name__ == "__main__":
   unittest.main()