Make base::Value::TYPE a scoped enum.

chrome/renderer/extensions/cast_streaming_native_handler.cc

Index: chrome/renderer/extensions/cast_streaming_native_handler.cc
diff --git a/chrome/renderer/extensions/cast_streaming_native_handler.cc b/chrome/renderer/extensions/cast_streaming_native_handler.cc
index 6f504ac583783d6b36c4fd83427e1751aae816e2..38ab2ae7408a3acac7fb5e813348139a593be654 100644
--- a/chrome/renderer/extensions/cast_streaming_native_handler.cc
+++ b/chrome/renderer/extensions/cast_streaming_native_handler.cc
@@ -936,7 +936,7 @@ void CastStreamingNativeHandler::StartCastRtpReceiver(
     std::unique_ptr<V8ValueConverter> converter(V8ValueConverter::create());
     std::unique_ptr<base::Value> options_value(
         converter->FromV8Value(args[8], context()->v8_context()));
-    if (!options_value->IsType(base::Value::TYPE_NULL)) {
+    if (!options_value->IsType(base::Value::Type::NONE)) {
       options = base::DictionaryValue::From(std::move(options_value));
       if (!options) {
         args.GetIsolate()->ThrowException(v8::Exception::TypeError(