Add chrome://site-tiles-internals/

components/ntp_tiles/popular_sites.h

Index: components/ntp_tiles/popular_sites.h
diff --git a/components/ntp_tiles/popular_sites.h b/components/ntp_tiles/popular_sites.h
index 639aedf4046614a51c46c6e547cf2b4d43a51c3d..d7679fda87b0f6de4ce1a9156f7d17734392e80d 100644
--- a/components/ntp_tiles/popular_sites.h
+++ b/components/ntp_tiles/popular_sites.h
@@ -94,6 +94,11 @@ class PopularSites : public net::URLFetcherDelegate {
 
   const base::FilePath& local_path() const { return local_path_; }
 
+  // Public for diagnostic pages only.
+  GURL GetURLToUse();
+  std::string GetCountryToUse();
+  std::string GetVersionToUse();
+
   // Register preferences used by this class.
   static void RegisterProfilePrefs(
       user_prefs::PrefRegistrySyncable* user_prefs);