Expose Value::GetList and Value(ListStorage) on ListValue

base/values.cc

Index: base/values.cc
diff --git a/base/values.cc b/base/values.cc
index 3397f1c3450c21c5cd58937c36ce9786cc41fb12..eebdfb0a599cc2cc647067812ed8fcd4b05ad96e 100644
--- a/base/values.cc
+++ b/base/values.cc
@@ -1059,6 +1059,11 @@ std::unique_ptr<ListValue> ListValue::From(std::unique_ptr<Value> value) {
 
 ListValue::ListValue() : Value(Type::LIST) {}
 
+ListValue::ListValue(const ListStorage& in_list) : Value(in_list) {}
+
+ListValue::ListValue(ListStorage&& in_list) noexcept
+    : Value(std::move(in_list)) {}
+
 void ListValue::Clear() {
   list_->clear();
 }