[tracing] Introduce support for userland memory allocators dumps.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 1230 matching lines @@
     "threading/watchdog_unittest.cc",
     "threading/worker_pool_posix_unittest.cc",
     "threading/worker_pool_unittest.cc",
     "time/pr_time_unittest.cc",
     "time/time_unittest.cc",
     "time/time_win_unittest.cc",
     "timer/hi_res_timer_manager_unittest.cc",
     "timer/mock_timer_unittest.cc",
     "timer/timer_unittest.cc",
     "tools_sanity_unittest.cc",
+    "trace_event/memory_allocator_dump_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",
@@ skipping 200 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }