[turbofan] Respect unset kBailoutOnUninitialized flag in element access.

Change-Id: Ie996f5da3f2f4a45b5664e33833362b8d13c476c
Reviewed-on: https://chromium-review.googlesource.com/c/1460943Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59466}

src/compiler/js-native-context-specialization.cc

@@ -1085,8 +1085,12 @@ Reduction JSNativeContextSpecialization::ReduceNamedAccess(
 
   // Nothing to do if we have no non-deprecated maps.
   if (access_infos.empty()) {
-    return ReduceSoftDeoptimize(
-        node, DeoptimizeReason::kInsufficientTypeFeedbackForGenericNamedAccess);
+    if (flags() & kBailoutOnUninitialized) {
+      return ReduceSoftDeoptimize(
+          node,
+          DeoptimizeReason::kInsufficientTypeFeedbackForGenericNamedAccess);
+    }
+    return NoChange();
   }
 
   // Ensure that {index} matches the specified {name} (if {index} is given).