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

components/proximity_auth/wire_message.cc

Index: components/proximity_auth/wire_message.cc
diff --git a/components/proximity_auth/wire_message.cc b/components/proximity_auth/wire_message.cc
index ef27a3139f23615cf8d0c602a9982caa18e30322..6da69d1a4256282248f4769c7586939b9b3dfe2f 100644
--- a/components/proximity_auth/wire_message.cc
+++ b/components/proximity_auth/wire_message.cc
@@ -88,7 +88,7 @@ std::unique_ptr<WireMessage> WireMessage::Deserialize(
 
   std::unique_ptr<base::Value> body_value =
       base::JSONReader::Read(serialized_message.substr(kHeaderLength));
-  if (!body_value || !body_value->IsType(base::Value::TYPE_DICTIONARY)) {
+  if (!body_value || !body_value->IsType(base::Value::Type::DICTIONARY)) {
     PA_LOG(WARNING) << "Error: Unable to parse message as JSON.";
     return std::unique_ptr<WireMessage>();
   }