Removed a bunch of GetExistingThreadLocal calls by threading the Isolate.

src/type-info.cc

Index: src/type-info.cc
diff --git a/src/type-info.cc b/src/type-info.cc
index f97fb52af31d6c581aee013bc86157c818b9e77c..7a9a5de8097dcd561379887da1b5d197d04fdd67 100644
--- a/src/type-info.cc
+++ b/src/type-info.cc
@@ -79,7 +79,7 @@ static uint32_t IdToKey(TypeFeedbackId ast_id) {
 Handle<Object> TypeFeedbackOracle::GetInfo(TypeFeedbackId ast_id) {
   int entry = dictionary_->FindEntry(IdToKey(ast_id));
   return entry != UnseededNumberDictionary::kNotFound
-      ? Handle<Object>(dictionary_->ValueAt(entry))
+      ? Handle<Object>(dictionary_->ValueAt(entry), isolate_)
       : Handle<Object>::cast(isolate_->factory()->undefined_value());
 }