extensions: Use V8 Maybe APIs in NativeHandler

extensions/renderer/utils_native_handler.cc

 // Copyright 2014 The Chromium 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 "extensions/renderer/utils_native_handler.h"
 
 #include "base/strings/stringprintf.h"
 #include "extensions/renderer/script_context.h"
 #include "third_party/WebKit/public/web/WebScopedMicrotaskSuppression.h"
 #include "third_party/WebKit/public/web/WebSerializedScriptValue.h"
@@ skipping 42 matching lines @@
           "})",
           name.c_str(), name.c_str(), name.c_str()).c_str());
   v8::Local<v8::Value> func_as_value = context()->module_system()->RunString(
       source, v8::String::NewFromUtf8(GetIsolate(), name.c_str()));
   if (func_as_value.IsEmpty() || func_as_value->IsUndefined()) {
     args.GetReturnValue().SetUndefined();
     return;
   }
 
   // TODO(fsamuel): Move privates from ModuleSystem to a shared location.
-  v8::Local<v8::Object> natives(context()->module_system()->NewInstance());
-  CHECK(!natives.IsEmpty());  // this can happen if v8 has issues
+  v8::Local<v8::Object> natives;
+  if (!context()->module_system()->NewInstance().ToLocal(&natives))
+    NOTREACHED();  // this can happen if v8 has issues
   v8::Local<v8::Function> func = func_as_value.As<v8::Function>();
   v8::Local<v8::Value> func_args[] = {
       context()->safe_builtins()->GetObjekt(),
       context()->safe_builtins()->GetFunction(),
       natives->Get(v8::String::NewFromUtf8(GetIsolate(), "privates",
                                            v8::String::kInternalizedString)),
       cls,
       superclass};
   v8::Local<v8::Value> result;
   {
     v8::TryCatch try_catch;
     try_catch.SetCaptureMessage(true);
     result = context()->CallFunction(func, arraysize(func_args), func_args);
     if (try_catch.HasCaught()) {
       args.GetReturnValue().SetUndefined();
       return;
     }
   }
   args.GetReturnValue().Set(result);
 }
 
 void UtilsNativeHandler::DeepCopy(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(1, args.Length());
   args.GetReturnValue().Set(
       blink::WebSerializedScriptValue::serialize(args[0]).deserialize());
 }
 
 }  // namespace extensions