Inline StringValue into base::Value

chrome/browser/extensions/api/streams_private/streams_private_api.cc

Index: chrome/browser/extensions/api/streams_private/streams_private_api.cc
diff --git a/chrome/browser/extensions/api/streams_private/streams_private_api.cc b/chrome/browser/extensions/api/streams_private/streams_private_api.cc
index dc12dac808f754a699567fba4e96c960674587f7..f89b9befa66c256b2196cebc2403dff6ed58295a 100644
--- a/chrome/browser/extensions/api/streams_private/streams_private_api.cc
+++ b/chrome/browser/extensions/api/streams_private/streams_private_api.cc
@@ -39,7 +39,7 @@ void CreateResponseHeadersDictionary(const net::HttpResponseHeaders* headers,
     if (result->Get(header_name, &existing_value)) {
       base::StringValue* existing_string_value =
           static_cast<base::StringValue*>(existing_value);
-      existing_string_value->GetString()->append(", ").append(header_value);
+      existing_string_value->GetString().append(", ").append(header_value);
     } else {
       result->SetString(header_name, header_value);
     }