Simplify feedback vector creation and store in SharedFunctionInfo.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index c91c3f908fcb02a713455ca99cd383670d6f5450..ee57e7c748b2bd44c24717b2078c24775cb47790 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -3131,6 +3131,7 @@ RUNTIME_FUNCTION(Runtime_SetCode) {
   target_shared->ReplaceCode(source_shared->code());
   target_shared->set_scope_info(source_shared->scope_info());
   target_shared->set_length(source_shared->length());
+  target_shared->set_feedback_vector(source_shared->feedback_vector());
   target_shared->set_formal_parameter_count(
       source_shared->formal_parameter_count());
   target_shared->set_script(source_shared->script());
@@ -8617,10 +8618,10 @@ RUNTIME_FUNCTION(Runtime_ClearFunctionTypeFeedback) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
+  function->shared()->ClearTypeFeedbackInfo();
   Code* unoptimized = function->shared()->code();
   if (unoptimized->kind() == Code::FUNCTION) {
     unoptimized->ClearInlineCaches();
-    unoptimized->ClearTypeFeedbackInfo(isolate->heap());
   }
   return isolate->heap()->undefined_value();
 }