[Android] Persist ordering of NTP suggestions.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 4f2867eb0c601463d3e2af99be08b693005ad2af..f310bec226d5d55f4f286c10c4d7faede73a13c1 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1493,6 +1493,15 @@ const char kNtpCollapsedSyncPromo[] = "ntp.collapsed_sync_promo";
 // Which page should be visible on the new tab page v4
 const char kNtpShownPage[] = "ntp.shown_page";
 
+#if defined(OS_ANDROID)
+// Ordered list of website suggestions shown on the new tab page that will allow
+// retaining the order even if the suggestions change over time.
+const char kNTPSuggestionsURL[] = "ntp.suggestions_url";
+
+// Whether the suggestion was derived from personal data.
+const char kNTPSuggestionsIsPersonal[] = "ntp.suggestions_is_personal";
+#endif
+
 // A private RSA key for ADB handshake.
 const char kDevToolsAdbKey[] = "devtools.adb_key";