Revert "Continued fix for 351257. Reusing the feedback vector is too complex."

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 02be8a66a3eb3f09b2407ba217c3bd261973d6a3..4bca2c70c77f35cd8b0cdc0711d4a4af08c2faf2 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -2929,7 +2929,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetCode) {
   // Set the code, scope info, formal parameter count, and the length
   // of the target shared function info.
   target_shared->ReplaceCode(source_shared->code());
-  target_shared->set_feedback_vector(source_shared->feedback_vector());
   target_shared->set_scope_info(source_shared->scope_info());
   target_shared->set_length(source_shared->length());
   target_shared->set_formal_parameter_count(
@@ -8478,10 +8477,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ClearFunctionTypeFeedback) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
-  function->shared()->ClearTypeFeedbackInfo(isolate->heap());
   Code* unoptimized = function->shared()->code();
   if (unoptimized->kind() == Code::FUNCTION) {
     unoptimized->ClearInlineCaches();
+    unoptimized->ClearTypeFeedbackInfo(isolate->heap());
   }
   return isolate->heap()->undefined_value();
 }