Add accumulator to allocation profiler

runtime/vm/service.cc

Index: runtime/vm/service.cc
diff --git a/runtime/vm/service.cc b/runtime/vm/service.cc
index afc31be2c2550e26e05d32107b94cd64f826fb00..95f24d9abd55178a2c26961f7a2ca49045d58fb7 100644
--- a/runtime/vm/service.cc
+++ b/runtime/vm/service.cc
@@ -1086,6 +1086,21 @@ static bool HandleCoverage(Isolate* isolate, JSONStream* js) {
 
 
 static bool HandleAllocationProfile(Isolate* isolate, JSONStream* js) {
+  if (js->num_arguments() == 2) {
+    const char* sub_command = js->GetArgument(1);
+    if (!strcmp(sub_command, "reset")) {
+      isolate->class_table()->ResetAllocationAccumulators();
+      isolate->class_table()->AllocationProfilePrintToJSONStream(js);
+      return true;
+    } else {
+      PrintError(js, "Unrecognized subcommand '%s'", sub_command);
+      return true;
+    }
+  }
+  if (js->num_arguments() != 1) {
+    PrintError(js, "Command too long");
+    return true;
+  }
   isolate->class_table()->AllocationProfilePrintToJSONStream(js);
   return true;
 }