[Startup Tracing] Enable startup tracing from config file

components/tracing_nacl.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': [
     '../build/common_untrusted.gypi',
   ],
   'conditions': [
@@ skipping 19 matching lines @@
             'build_newlib': 0,
             'build_irt': 1,
             'build_pnacl_newlib': 0,
             'build_nonsfi_helper': 1,
           },
           'sources': [
             'tracing/child_memory_dump_manager_delegate_impl.cc',
             'tracing/child_memory_dump_manager_delegate_impl.h',
             'tracing/child_trace_message_filter.cc',
             'tracing/child_trace_message_filter.h',
+            'tracing/startup_tracing.cc',
+            'tracing/startup_tracing.h',
             'tracing/tracing_messages.cc',
             'tracing/tracing_messages.h',
           ],
         },
       ],
     }],
   ],
 }