[tracing] Move GN/gyp build files under trace_event

base/base.gypi

Index: base/base.gypi
diff --git a/base/base.gypi b/base/base.gypi
index b4f779302502c5e9bca881a2b09484496d233cca..40c7d356816c7c9f85a0b2d18741782de8dcba7a 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -3,6 +3,9 @@
 # found in the LICENSE file.
 
 {
+  'includes': [
+    'trace_event/trace_event.gypi',
+  ],
   'target_defaults': {
     'variables': {
       'base_target': 0,
@@ -660,38 +663,6 @@
           'timer/mock_timer.h',
           'timer/timer.cc',
           'timer/timer.h',
-          'trace_event/memory_allocator_attributes.h',
-          'trace_event/memory_allocator_dump.cc',
-          'trace_event/memory_allocator_dump.h',
-          'trace_event/memory_dump_manager.cc',
-          'trace_event/memory_dump_manager.h',
-          'trace_event/memory_dump_provider.cc',
-          'trace_event/memory_dump_provider.h',
-          '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_maps_dump_provider.cc',
-          'trace_event/process_memory_maps_dump_provider.h',
-          'trace_event/process_memory_totals.cc',
-          'trace_event/process_memory_totals.h',
-          'trace_event/process_memory_totals_dump_provider.cc',
-          'trace_event/process_memory_totals_dump_provider.h',
-          '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_impl.cc',
-          'trace_event/trace_event_impl.h',
-          'trace_event/trace_event_impl_constants.cc',
-          'trace_event/trace_event_memory.cc',
-          'trace_event/trace_event_memory.h',
-          'trace_event/trace_event_synthetic_delay.cc',
-          'trace_event/trace_event_synthetic_delay.h',
-          'trace_event/trace_event_system_stats_monitor.cc',
-          'trace_event/trace_event_system_stats_monitor.h',
-          'trace_event/trace_event_win.cc',
-          'trace_event/trace_event_win.h',
           'tracked_objects.cc',
           'tracked_objects.h',
           'tracking_info.cc',
@@ -754,6 +725,7 @@
           'win/windows_version.h',
           'win/wrapped_window_proc.cc',
           'win/wrapped_window_proc.h',
+          '<@(trace_event_sources)',
         ],
         'defines': [
           'BASE_IMPLEMENTATION',