Visual refresh of allocation profile page

runtime/vm/class_table.cc

Index: runtime/vm/class_table.cc
diff --git a/runtime/vm/class_table.cc b/runtime/vm/class_table.cc
index a096991ea9b1cd55ade96120a358e62bf05df664..a21be6b3e22f3e02a3ca2663481bea808387a5a0 100644
--- a/runtime/vm/class_table.cc
+++ b/runtime/vm/class_table.cc
@@ -333,6 +333,15 @@ void ClassTable::AllocationProfilePrintJSON(JSONStream* stream) {
   JSONObject obj(stream);
   obj.AddProperty("type", "AllocationProfile");
   obj.AddProperty("id", "allocationprofile");
+  obj.AddPropertyF(
+      "dateLastAccumulatorReset",
+      "%" Pd64 "",
+      isolate->last_allocationprofile_accumulator_reset_timestamp());
+  obj.AddPropertyF(
+      "dateLastServiceGC",
+      "%" Pd64 "",
+      isolate->last_allocationprofile_gc_timestamp());
+
   {
     JSONObject heaps(&obj, "heaps");
     {