Make JSONParser a pure interface.

chrome/browser/extensions/webstore_data_fetcher.cc

Index: chrome/browser/extensions/webstore_data_fetcher.cc
diff --git a/chrome/browser/extensions/webstore_data_fetcher.cc b/chrome/browser/extensions/webstore_data_fetcher.cc
index c6e5a57074e0d6dbdcc4bb377a647fe111728a7f..a01b1175f2e334834e7aa0d964febb4dfbef81b6 100644
--- a/chrome/browser/extensions/webstore_data_fetcher.cc
+++ b/chrome/browser/extensions/webstore_data_fetcher.cc
@@ -82,13 +82,11 @@ void WebstoreDataFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
   std::string webstore_json_data;
   fetcher->GetResponseAsString(&webstore_json_data);
 
-  scoped_refptr<safe_json::SafeJsonParser> parser =
-      new safe_json::SafeJsonParser(
+  // The parser will call us back via one of the callbacks.
+  safe_json::SafeJsonParser::Parse(
           webstore_json_data,
           base::Bind(&WebstoreDataFetcher::OnJsonParseSuccess, AsWeakPtr()),
           base::Bind(&WebstoreDataFetcher::OnJsonParseFailure, AsWeakPtr()));
-  // The parser will call us back via one of the callbacks.
-  parser->Start();
 }
 
 }  // namespace extensions