WIP: Create a public v8::DictionarySchema API for bulk reads from dict objects.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 56b666fb8126f7b5d7512c310f3caf1354d620f0..c80113afb7659f5d6e2a7c61e4cbd25b0d8b981d 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -10187,6 +10187,11 @@ void DescriptorArray::Sort() {
   DCHECK(IsSortedNoDuplicates());
 }
 
+// static
+Handle<DictionarySchema> DictionarySchema::New(Isolate* isolate, int size) {
+  return Handle<DictionarySchema>::cast(
+      isolate->factory()->NewFixedArray(size, TENURED));
+}
 
 Handle<AccessorPair> AccessorPair::Copy(Handle<AccessorPair> pair) {
   Handle<AccessorPair> copy = pair->GetIsolate()->factory()->NewAccessorPair();