[memory-infra] Add method to override importance of ownership edges

base/trace_event/memory_allocator_dump_guid.h

Index: base/trace_event/memory_allocator_dump_guid.h
diff --git a/base/trace_event/memory_allocator_dump_guid.h b/base/trace_event/memory_allocator_dump_guid.h
index b6472c66129bda37c95817984c796e6a6be1dfff..2a420a2af7e9fb5afb9d2e9e4d2b10bcff4df98c 100644
--- a/base/trace_event/memory_allocator_dump_guid.h
+++ b/base/trace_event/memory_allocator_dump_guid.h
@@ -39,6 +39,10 @@ class BASE_EXPORT MemoryAllocatorDumpGuid {
     return !(*this == other);
   }
 
+  bool operator<(const MemoryAllocatorDumpGuid& other) const {
+    return guid_ < other.guid_;
+  }
+
  private:
   uint64_t guid_;