memory-infra: Reland: Fill the memory dump callback result (2/2)

base/trace_event/process_memory_dump.h

Index: base/trace_event/process_memory_dump.h
diff --git a/base/trace_event/process_memory_dump.h b/base/trace_event/process_memory_dump.h
index 6f8d167273327e2488ae30f12ca53928c810543d..45a973964231fa7d794b2be72d3175871970720b 100644
--- a/base/trace_event/process_memory_dump.h
+++ b/base/trace_event/process_memory_dump.h
@@ -167,6 +167,7 @@ class BASE_EXPORT ProcessMemoryDump {
   void AsValueInto(TracedValue* value) const;
 
   ProcessMemoryTotals* process_totals() { return &process_totals_; }
+  const ProcessMemoryTotals* process_totals() const { return &process_totals_; }
   bool has_process_totals() const { return has_process_totals_; }
   void set_has_process_totals() { has_process_totals_ = true; }