Add configurable limit to allocations in heap profiler.

base/trace_event/heap_profiler_heap_dump_writer.h

Index: base/trace_event/heap_profiler_heap_dump_writer.h
diff --git a/base/trace_event/heap_profiler_heap_dump_writer.h b/base/trace_event/heap_profiler_heap_dump_writer.h
index 88fb86f523ba0275afbf4839bde3dc46e64581b2..4a80c0c647591dadcaf090352186a63d99930bde 100644
--- a/base/trace_event/heap_profiler_heap_dump_writer.h
+++ b/base/trace_event/heap_profiler_heap_dump_writer.h
@@ -97,6 +97,9 @@ class BASE_EXPORT HeapDumpWriter {
   // dump writer instance.
   TypeNameDeduplicator* const type_name_deduplicator_;
 
+  // Minimum size of an allocation for which a stack trace will be kept.
+  size_t min_allocation_size_bytes_;
+
   DISALLOW_COPY_AND_ASSIGN(HeapDumpWriter);
 };