Make JSONParser a pure interface.

chrome/browser/supervised_user/supervised_user_site_list.h

Index: chrome/browser/supervised_user/supervised_user_site_list.h
diff --git a/chrome/browser/supervised_user/supervised_user_site_list.h b/chrome/browser/supervised_user/supervised_user_site_list.h
index 61625e769fcbd680cde1d4e428adc1aba930fb80..22794f2b4af7bf0438530db937a2deb8987c17ca 100644
--- a/chrome/browser/supervised_user/supervised_user_site_list.h
+++ b/chrome/browser/supervised_user/supervised_user_site_list.h
@@ -60,11 +60,6 @@ class SupervisedUserSiteList
   // the newly created object.
   static void Load(const base::FilePath& file, const LoadedCallback& callback);
 
-  // Sets whether the site list should be loaded in-process or out-of-process.
-  // In-process loading should only be used in tests (to avoid having to set up
-  // child process handling).
-  static void SetLoadInProcessForTesting(bool in_process);
-
   // Returns a list of all sites in this site list.
   const std::vector<Site>& sites() const { return sites_; }