Fix name of mojo test source file so it gets compiled.

third_party/mojo/mojo_edk_tests.gyp

 # 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.
 
 {
   'includes': [
     'mojo_variables.gypi',
   ],
   'targets': [
     {
@@ skipping 240 matching lines @@
         '../../gin/gin.gyp:gin_test',
         'mojo_public.gyp:mojo_environment_standalone',
         'mojo_public.gyp:mojo_public_test_interfaces',
         'mojo_public.gyp:mojo_utility',
         'mojo_edk.gyp:mojo_js_lib',
         'mojo_edk.gyp:mojo_run_all_unittests',
         'mojo_js_to_cpp_bindings',
       ],
       'sources': [
         'src/mojo/edk/js/test/run_js_integration_tests.cc',
-        'src/mojo/edk/js/tests/js_to_cpp_tests',
+        'src/mojo/edk/js/tests/js_to_cpp_tests.cc',
       ],
     },
     {
       'target_name': 'mojo_js_to_cpp_bindings',
       'type': 'none',
       'variables': {
         'mojom_files': [
           'src/mojo/edk/js/tests/js_to_cpp.mojom',
         ],
       },
       'includes': [ 'mojom_bindings_generator_explicit.gypi' ],
     },
   ],
 }