Refactor prototype setting code and expose SetPrototype to public V8 API.

src/api.cc

 // Copyright 2009 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 2014 matching lines @@
 
 Local<Value> v8::Object::GetPrototype() {
   ON_BAILOUT("v8::Object::GetPrototype()", return Local<v8::Value>());
   ENTER_V8;
   i::Handle<i::Object> self = Utils::OpenHandle(this);
   i::Handle<i::Object> result = i::GetPrototype(self);
   return Utils::ToLocal(result);
 }
 
 
+bool v8::Object::SetPrototype(Handle<Value> value) {
+  ON_BAILOUT("v8::Object::SetPrototype()", return false);
+  ENTER_V8;
+  i::Handle<i::JSObject> self = Utils::OpenHandle(this);
+  i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
+  EXCEPTION_PREAMBLE();
+  i::Handle<i::Object> result = i::SetPrototype(self, value_obj);
+  has_pending_exception = result.is_null();
+  EXCEPTION_BAILOUT_CHECK(false);
+  return true;
+}
+
+
 Local<Object> v8::Object::FindInstanceInPrototypeChain(
     v8::Handle<FunctionTemplate> tmpl) {
   ON_BAILOUT("v8::Object::FindInstanceInPrototypeChain()",
              return Local<v8::Object>());
   ENTER_V8;
   i::JSObject* object = *Utils::OpenHandle(this);
   i::FunctionTemplateInfo* tmpl_info = *Utils::OpenHandle(*tmpl);
   while (!object->IsInstanceOf(tmpl_info)) {
     i::Object* prototype = object->GetPrototype();
     if (!prototype->IsJSObject()) return Local<Object>();
@@ skipping 1781 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* thread_local =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   thread_local->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal