Fix GN NaCl Debug build of base.

base/trace_event/BUILD.gn

+# Copyright (c) 2015 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.
+
+source_set("trace_event") {
+  sources = [
+    "memory_dump_manager.cc",
+    "memory_dump_manager.h",
+    "memory_dump_provider.h",
+    "process_memory_dump.cc",
+    "process_memory_dump.h",
+    "process_memory_maps.cc",
+    "process_memory_maps.h",
+    "process_memory_maps_dump_provider.cc",
+    "process_memory_maps_dump_provider.h",
+    "process_memory_totals.cc",
+    "process_memory_totals.h",
+    "process_memory_totals_dump_provider.cc",
+    "process_memory_totals_dump_provider.h",
+    "trace_event.h",
+    "trace_event_android.cc",
+    "trace_event_argument.cc",
+    "trace_event_argument.h",
+    "trace_event_impl.cc",
+    "trace_event_impl.h",
+    "trace_event_impl_constants.cc",
+    "trace_event_memory.cc",
+    "trace_event_memory.h",
+    "trace_event_synthetic_delay.cc",
+    "trace_event_synthetic_delay.h",
+    "trace_event_system_stats_monitor.cc",
+    "trace_event_system_stats_monitor.h",
+    "trace_event_win.cc",
+    "trace_event_win.h",
+  ]
+
+  if (is_nacl) {
+    sources -= [
+      "process_memory_totals_dump_provider.cc",
+      "trace_event_system_stats_monitor.cc",
+    ]
+  }
+
+  defines = [ "BASE_IMPLEMENTATION" ]
+
+  deps = [
+    "//base/debug",
+    "//base/json",
+    "//base/memory",
+    "//base/process",
+    "//base/third_party/dynamic_annotations",
+  ]
+
+  allow_circular_includes_from = [
+    "//base/debug",
+    "//base/memory",
+    "//base/process",
+  ]
+
+  visibility = [ "//base/*" ]
+}