DO NOT COMMIT: hack hack hacking on preloading md-settings

content/browser/webui/web_ui_data_source_impl.h

Index: content/browser/webui/web_ui_data_source_impl.h
diff --git a/content/browser/webui/web_ui_data_source_impl.h b/content/browser/webui/web_ui_data_source_impl.h
index 2cc738cfd25e23e5cb0e466cd04bf74faf8c0cbe..c83a55da5a1132309f8481f6fe6f7a5d343d13db 100644
--- a/content/browser/webui/web_ui_data_source_impl.h
+++ b/content/browser/webui/web_ui_data_source_impl.h
@@ -44,6 +44,7 @@ class CONTENT_EXPORT WebUIDataSourceImpl
   void OverrideContentSecurityPolicyObjectSrc(const std::string& data) override;
   void OverrideContentSecurityPolicyChildSrc(const std::string& data) override;
   void DisableDenyXFrameOptions() override;
+  void AddPreloadHeader(const std::string& preload_header) override;
 
  protected:
   ~WebUIDataSourceImpl() override;
@@ -82,6 +83,9 @@ class CONTENT_EXPORT WebUIDataSourceImpl
   int default_resource_;
   std::string json_path_;
   std::map<std::string, int> path_to_idr_map_;
+
+  const std::map<std::string, int>& path_to_idr_map() const override;
+
   // The |replacements_| is intended to replace |localized_strings_|.
   // TODO(dschuyler): phase out |localized_strings_| in Q1 2016. (Or rename
   // to |load_time_flags_| if the usage is reduced to storing flags only).
@@ -96,6 +100,7 @@ class CONTENT_EXPORT WebUIDataSourceImpl
   bool deny_xframe_options_;
   bool add_load_time_data_defaults_;
   bool replace_existing_source_;
+  std::vector<std::string> preload_headers_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUIDataSourceImpl);
 };