Introduce a maybe-version of Function::New

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 4264 matching lines @@
 
 
 Local<v8::Value> Object::CallAsConstructor(int argc,
                                            v8::Handle<v8::Value> argv[]) {
   auto context = ContextFromHeapObject(Utils::OpenHandle(this));
   Local<Value>* argv_cast = reinterpret_cast<Local<Value>*>(argv);
   RETURN_TO_LOCAL_UNCHECKED(CallAsConstructor(context, argc, argv_cast), Value);
 }
 
 
-Local<Function> Function::New(Isolate* v8_isolate,
-                              FunctionCallback callback,
-                              Local<Value> data,
-                              int length) {
-  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+MaybeLocal<Function> Function::New(Local<Context> context,
+                                   FunctionCallback callback, Local<Value> data,
+                                   int length) {
+  i::Isolate* isolate = Utils::OpenHandle(*context)->GetIsolate();
   LOG_API(isolate, "Function::New");
   ENTER_V8(isolate);
-  return FunctionTemplateNew(
-      isolate, callback, data, Local<Signature>(), length, true)->
-      GetFunction();
+  return FunctionTemplateNew(isolate, callback, data, Local<Signature>(),
+                             length, true)->GetFunction(context);
 }
 
 
+Local<Function> Function::New(Isolate* v8_isolate, FunctionCallback callback,
+                              Local<Value> data, int length) {
+  return Function::New(v8_isolate->GetCurrentContext(), callback, data, length)
+      .FromMaybe(Local<Function>());
+}
+
+
 Local<v8::Object> Function::NewInstance() const {
   return NewInstance(0, NULL);
 }
 
 
 MaybeLocal<Object> Function::NewInstance(Local<Context> context, int argc,
                                          v8::Handle<v8::Value> argv[]) const {
   PREPARE_FOR_EXECUTION_WITH_CALLBACK(context, "v8::Function::NewInstance()",
                                       Object);
   i::TimerEventScope<i::TimerEventExecute> timer_scope(isolate);
@@ skipping 3713 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