[tracing] Introduce support for userland memory allocators dumps.

base/base.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 638 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 933 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }