The TRACE_LINK_IDS macro

base/BUILD.gn

 # 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 920 matching lines @@
     "trace_event/process_memory_dump.cc",
     "trace_event/process_memory_dump.h",
     "trace_event/process_memory_maps.cc",
     "trace_event/process_memory_maps.h",
     "trace_event/process_memory_totals.cc",
     "trace_event/process_memory_totals.h",
     "trace_event/trace_buffer.cc",
     "trace_event/trace_buffer.h",
     "trace_event/trace_config.cc",
     "trace_event/trace_config.h",
+    "trace_event/trace_event.cc",

[oystein (OOO til 10th of July), 2016/10/06 18:40:42]

Why not add the function to trace_event_impl.cc? (I know the _impl is a bit of a
misnomer and should probably be renamed, but I don't think we need two separate
.cc's here).

     "trace_event/trace_event.h",
     "trace_event/trace_event_android.cc",
     "trace_event/trace_event_argument.cc",
     "trace_event/trace_event_argument.h",
     "trace_event/trace_event_etw_export_win.cc",
     "trace_event/trace_event_etw_export_win.h",
     "trace_event/trace_event_impl.cc",
     "trace_event/trace_event_impl.h",
     "trace_event/trace_event_memory_overhead.cc",
     "trace_event/trace_event_memory_overhead.h",
@@ skipping 1498 matching lines @@
     testonly = true
     deps = [
       ":base_java",
     ]
     java_files = [
       "test/android/java/src/org/chromium/base/ContentUriTestUtils.java",
       "test/android/java/src/org/chromium/base/TestSystemMessageHandler.java",
     ]
   }
 }