[tracing] Ignore tracing allocations in heap profiler

base/trace_event/trace_event.gypi

 # Copyright 2015 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': {
     'trace_event_sources' : [
       'trace_event/blame_context.cc',
       'trace_event/blame_context.h',
       'trace_event/common/trace_event_common.h',
+      'trace_event/heap_profiler.h',
       'trace_event/heap_profiler_allocation_context.cc',
       'trace_event/heap_profiler_allocation_context.h',
       'trace_event/heap_profiler_allocation_context_tracker.cc',
       'trace_event/heap_profiler_allocation_context_tracker.h',
       'trace_event/heap_profiler_allocation_register.cc',
       'trace_event/heap_profiler_allocation_register_posix.cc',
       'trace_event/heap_profiler_allocation_register_win.cc',
       'trace_event/heap_profiler_allocation_register.h',
       'trace_event/heap_profiler_heap_dump_writer.cc',
       'trace_event/heap_profiler_heap_dump_writer.h',
@@ skipping 75 matching lines @@
         ],
       }],
       ['OS == "android"', {
         'trace_event_test_sources' : [
           'trace_event/trace_event_android_unittest.cc',
         ],
       }],
     ],
   },
 }