Update from https://crrev.com/318214

base/base.gypi

 # Copyright (c) 2012 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_i18n_target': 0,
     },
@@ skipping 653 matching lines @@
           'timer/hi_res_timer_manager_win.cc',
           'timer/mock_timer.cc',
           'timer/mock_timer.h',
           'timer/timer.cc',
           'timer/timer.h',
           'trace_event/memory_dump_manager.cc',
           'trace_event/memory_dump_manager.h',
           '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',
@@ skipping 362 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }