When converting from equality to strict equality always note that number check is not needed since …

runtime/vm/flow_graph_optimizer.cc

Index: runtime/vm/flow_graph_optimizer.cc
===================================================================
--- runtime/vm/flow_graph_optimizer.cc	(revision 25822)
+++ runtime/vm/flow_graph_optimizer.cc	(working copy)
@@ -2880,6 +2880,8 @@
                                strict_kind,
                                compare->left()->CopyWithType(),
                                compare->right()->CopyWithType());
+    // Numbers override equality and are therefore not part of this conversion.
+    strict_comp->set_needs_number_check(false);
     current_instruction->ReplaceWith(strict_comp, current_iterator());
     return true;
   }