[tracing] Move GN/gyp build files under trace_event

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index c7a24811dc6348d11b77d6bdcd0b2d80ce453805..389357a9ae54cc443c9fa5ec7f81d605f11bad1d 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -656,15 +656,6 @@
         'timer/mock_timer_unittest.cc',
         'timer/timer_unittest.cc',
         'tools_sanity_unittest.cc',
-        'trace_event/memory_dump_manager_unittest.cc',
-        'trace_event/process_memory_maps_dump_provider_unittest.cc',
-        'trace_event/process_memory_totals_dump_provider_unittest.cc',
-        'trace_event/trace_event_argument_unittest.cc',
-        'trace_event/trace_event_memory_unittest.cc',
-        'trace_event/trace_event_synthetic_delay_unittest.cc',
-        'trace_event/trace_event_system_stats_monitor_unittest.cc',
-        'trace_event/trace_event_unittest.cc',
-        'trace_event/trace_event_win_unittest.cc',
         'tracked_objects_unittest.cc',
         'tuple_unittest.cc',
         'values_unittest.cc',
@@ -689,6 +680,7 @@
         'win/startup_information_unittest.cc',
         'win/win_util_unittest.cc',
         'win/wrapped_window_proc_unittest.cc',
+        '<@(trace_event_test_sources)',

[dsinclair, 2015/03/17 20:00:53]

Does this need an includes: section like the gypi?

[Primiano Tucci (use gerrit), 2015/03/17 20:29:11]

The include is inherited through base.gypi, i.e.

base.gyp -> base.gypi -> trace_event.gypi

If we move the include to base.gypi it becomes awkward because then we'd
copy/paste the include into base_nacl.gyp.
Also, from a logic viewpoint is base.gypi that depends on trace_event.gypi (and
there seem to be other precedents int he codebase of gypi files including other
gypi files)

       ],
       'dependencies': [
         'base',