Add basic tracing support to the gtest launcher

base/base.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 855 matching lines @@
         'test/gtest_xml_util.cc',
         'test/gtest_xml_util.h',
         'test/histogram_tester.cc',
         'test/histogram_tester.h',
         'test/icu_test_util.cc',
         'test/icu_test_util.h',
         'test/ios/wait_util.h',
         'test/ios/wait_util.mm',
         'test/launcher/test_launcher.cc',
         'test/launcher/test_launcher.h',
+        'test/launcher/test_launcher_tracer.cc',
+        'test/launcher/test_launcher_tracer.h',
         'test/launcher/test_result.cc',
         'test/launcher/test_result.h',
         'test/launcher/test_results_tracker.cc',
         'test/launcher/test_results_tracker.h',
         'test/launcher/unit_test_launcher.cc',
         'test/launcher/unit_test_launcher.h',
         'test/launcher/unit_test_launcher_ios.cc',
         'test/mock_chrome_application_mac.h',
         'test/mock_chrome_application_mac.mm',
         'test/mock_devices_changed_observer.cc',
@@ skipping 899 matching lines @@
                 ['include', 'mac/bind_objc_block_unittest_arc\\.mm$'],
                 ['include', 'mac/scoped_nsobject_unittest_arc\\.mm$'],
               ],
             }]
           ],
         },
       ],
     }],
   ],
 }