gin: Use V8 Maybe APIs

gin/object_template_builder.cc

 // Copyright 2013 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 "gin/object_template_builder.h"
 
 #include "gin/interceptor.h"
 #include "gin/per_isolate_data.h"
 #include "gin/public/wrapper_info.h"
 
@@ skipping 75 matching lines @@
     return;
   info.GetReturnValue().Set(0);
 }
 
 void NamedPropertyEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) {
   v8::Isolate* isolate = info.GetIsolate();
   NamedPropertyInterceptor* interceptor =
       NamedInterceptorFromV8(isolate, info.Holder());
   if (!interceptor)
     return;
-  info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(
-      ConvertToV8(isolate, interceptor->EnumerateNamedProperties(isolate))));
+  v8::Local<v8::Value> properties;
+  if (!TryConvertToV8(isolate, interceptor->EnumerateNamedProperties(isolate),
+                      &properties))
+    return;
+  info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(properties));
 }
 
 void IndexedPropertyGetter(uint32_t index,
                            const v8::PropertyCallbackInfo<v8::Value>& info) {
   v8::Isolate* isolate = info.GetIsolate();
   IndexedPropertyInterceptor* interceptor =
       IndexedInterceptorFromV8(isolate, info.Holder());
   if (!interceptor)
     return;
   info.GetReturnValue().Set(interceptor->GetIndexedProperty(isolate, index));
@@ skipping 11 matching lines @@
     info.GetReturnValue().Set(value);
 }
 
 void IndexedPropertyEnumerator(
     const v8::PropertyCallbackInfo<v8::Array>& info) {
   v8::Isolate* isolate = info.GetIsolate();
   IndexedPropertyInterceptor* interceptor =
       IndexedInterceptorFromV8(isolate, info.Holder());
   if (!interceptor)
     return;
-  info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(
-      ConvertToV8(isolate, interceptor->EnumerateIndexedProperties(isolate))));
+  v8::Local<v8::Value> properties;
+  if (!TryConvertToV8(isolate, interceptor->EnumerateIndexedProperties(isolate),
+                      &properties))
+    return;
+  info.GetReturnValue().Set(v8::Local<v8::Array>::Cast(properties));
 }
 
 }  // namespace
 
 ObjectTemplateBuilder::ObjectTemplateBuilder(v8::Isolate* isolate)
     : isolate_(isolate), template_(v8::ObjectTemplate::New(isolate)) {
   template_->SetInternalFieldCount(kNumberOfInternalFields);
 }
 
 ObjectTemplateBuilder::~ObjectTemplateBuilder() {
@@ skipping 31 matching lines @@
   return *this;
 }
 
 v8::Local<v8::ObjectTemplate> ObjectTemplateBuilder::Build() {
   v8::Local<v8::ObjectTemplate> result = template_;
   template_.Clear();
   return result;
 }
 
 }  // namespace gin