VM: Fix polymorphic inlining of recognized methods in the JIT.

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
diff --git a/runtime/vm/flow_graph_inliner.cc b/runtime/vm/flow_graph_inliner.cc
index 1601565197a82c56f0e799e6b9edc79f7e9a5056..d6942638b1c8dcfed0f895ffa76c5a2caeb417d4 100644
--- a/runtime/vm/flow_graph_inliner.cc
+++ b/runtime/vm/flow_graph_inliner.cc
@@ -1471,7 +1471,8 @@ bool PolymorphicInliner::CheckNonInlinedDuplicate(const Function& target) {
 
 bool PolymorphicInliner::TryInliningPoly(intptr_t receiver_cid,
                                         const Function& target) {
-  if (owner_->inliner_->use_speculative_inlining() &&
+  if ((!FLAG_precompiled_mode ||
+       owner_->inliner_->use_speculative_inlining()) &&
       TryInlineRecognizedMethod(receiver_cid, target)) {
     owner_->inlined_ = true;
     return true;