Reland of [tracing] Dump child processes' memory metrics in browser

base/trace_event/trace_event.gypi

Index: base/trace_event/trace_event.gypi
diff --git a/base/trace_event/trace_event.gypi b/base/trace_event/trace_event.gypi
index 6948d7cfe02953e12db578870218c0ce52ba46cd..090f7da2c1af95c691d357c86c6aaec1a8579f06 100644
--- a/base/trace_event/trace_event.gypi
+++ b/base/trace_event/trace_event.gypi
@@ -36,11 +36,8 @@
       '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.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_buffer.cc',
       'trace_event/trace_buffer.h',
       'trace_event/trace_config.cc',
@@ -79,7 +76,6 @@
       'trace_event/memory_allocator_dump_unittest.cc',
       'trace_event/memory_dump_manager_unittest.cc',
       'trace_event/process_memory_dump_unittest.cc',
-      'trace_event/process_memory_totals_dump_provider_unittest.cc',
       'trace_event/trace_config_memory_test_util.h',
       'trace_event/trace_config_unittest.cc',
       'trace_event/trace_event_argument_unittest.cc',
@@ -95,14 +91,6 @@
           'trace_event/malloc_dump_provider.h',
         ],
       }],
-      ['OS == "linux" or OS == "android"', {
-          'trace_event_sources': [
-            'trace_event/process_memory_maps_dump_provider.cc',
-          ],
-          'trace_event_test_sources' : [
-            'trace_event/process_memory_maps_dump_provider_unittest.cc',
-          ],
-      }],
       ['OS == "android"', {
         'trace_event_test_sources' : [
           'trace_event/trace_event_android_unittest.cc',