Allow dumping raw json fetched from the server.

chrome/browser/ui/webui/snippets_internals_message_handler.h

 // Copyright 2016 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_UI_WEBUI_SNIPPETS_INTERNALS_MESSAGE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SNIPPETS_INTERNALS_MESSAGE_HANDLER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 33 matching lines @@
   void SendInitialData();
   void SendSnippets();
   void SendDiscardedSnippets();
   void SendHosts();
   void SendJson(const std::string& json);
   void SendBoolean(const std::string& name, bool value);
   void SendString(const std::string& name, const std::string& value);
 
   ScopedObserver<ntp_snippets::NTPSnippetsService,
                  ntp_snippets::NTPSnippetsServiceObserver> observer_;
+
+  // Tracks whether we can already send messages to the page.
   bool dom_loaded_;
+
   ntp_snippets::NTPSnippetsService* ntp_snippets_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SnippetsInternalsMessageHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SNIPPETS_INTERNALS_MESSAGE_HANDLER_H_