Revert "Remove old serializer" It caused a regression, crbug.com/510422

public/web/WebPageSerializerClient.h

Index: public/web/WebPageSerializerClient.h
diff --git a/public/web/WebPageSerializerClient.h b/public/web/WebPageSerializerClient.h
index bd5d7a01cd36d9d347a898dde5842671060ca9c9..1a413b075941fbcd101a111dc31e84d2728db4fb 100644
--- a/public/web/WebPageSerializerClient.h
+++ b/public/web/WebPageSerializerClient.h
@@ -63,13 +63,14 @@ public:
     // parameter data contains the available data for saving. The parameter
     // status indicates the status of data serialization.
     virtual void didSerializeDataForFrame(const WebURL& frameURL,
-        const WebCString& data, PageSerializationStatus) = 0;
+                                          const WebCString& data,
+                                          PageSerializationStatus status) = 0;
     WebPageSerializerClient() { }
 
 protected:
     virtual ~WebPageSerializerClient() { }
 };
 
-} // namespace blink
+}  // namespace blink
 
 #endif