Return MaybeHandle from JsonParser.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2297 matching lines @@
 // --- J S O N ---
 
 Local<Value> JSON::Parse(Local<String> json_string) {
   i::Isolate* isolate = i::Isolate::Current();
   EnsureInitializedForIsolate(isolate, "v8::JSON::Parse");
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::String> source = i::Handle<i::String>(
       FlattenGetString(Utils::OpenHandle(*json_string)));
   EXCEPTION_PREAMBLE(isolate);
+  i::MaybeHandle<i::Object> maybe_result =
+      source->IsSeqOneByteString() ? i::JsonParser<true>::Parse(source)
+                                   : i::JsonParser<false>::Parse(source);
   i::Handle<i::Object> result;
-  if (source->IsSeqOneByteString()) {
-    result = i::JsonParser<true>::Parse(source);
-  } else {
-    result = i::JsonParser<false>::Parse(source);
-  }
-  has_pending_exception = result.is_null();
+  has_pending_exception = !maybe_result.ToHandle(&result);
   EXCEPTION_BAILOUT_CHECK(isolate, Local<Object>());
   return Utils::ToLocal(
       i::Handle<i::Object>::cast(scope.CloseAndEscape(result)));
 }
 
 
 // --- D a t a ---
 
 bool Value::FullIsUndefined() const {
   bool result = Utils::OpenHandle(this)->IsUndefined();
@@ skipping 5325 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal