Make JSONParser a pure interface.

chrome/browser/extensions/webstore_install_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALL_HELPER_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALL_HELPER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 78 matching lines @@
 
   // The client who we'll report results back to.
   Delegate* delegate_;
 
   // The extension id of the manifest we're parsing.
   std::string id_;
 
   // The manifest to parse.
   std::string manifest_;
 
-  scoped_refptr<safe_json::SafeJsonParser> json_parser_;
+  safe_json::SafeJsonParser* json_parser_;
 
   // If |icon_url_| is non-empty, it needs to be fetched and decoded into an
   // SkBitmap.
   GURL icon_url_;
   net::URLRequestContextGetter* context_getter_; // Only usable on UI thread.
   scoped_ptr<chrome::BitmapFetcher> icon_fetcher_;
 
   // Flags for whether we're done doing icon decoding and manifest parsing.
   bool icon_decode_complete_;
   bool manifest_parse_complete_;
 
   // The results of successful decoding/parsing.
   SkBitmap icon_;
   scoped_ptr<base::DictionaryValue> parsed_manifest_;
 
   // A details string for keeping track of any errors.
   std::string error_;
 
   // A code to distinguish between an error with the icon, and an error with the
   // manifest.
   Delegate::InstallHelperResultCode parse_error_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALL_HELPER_H_