Remove kDistroDict from Preferences.

chrome/common/pref_names.h

Index: chrome/common/pref_names.h
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index 03a07aae8435d0d9bd473ae62c3c9767c100dc19..6321511eb172407b3a909554c3bd8a2960b9f76c 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -14,6 +14,7 @@
 #include "extensions/features/features.h"
 #include "media/media_features.h"
 #include "ppapi/features/features.h"
+#include "rlz/features/features.h"
 
 namespace prefs {
 
@@ -61,6 +62,10 @@ extern const char kSupervisedUserSharedSettings[];
 extern const char kSupervisedUserWhitelists[];
 extern const char kURLsToRestoreOnStartup[];
 
+#if BUILDFLAG(ENABLE_RLZ)
+extern const char kRlzPingDelay[];
+#endif  // BUILDFLAG(ENABLE_RLZ)
+
 // For OS_CHROMEOS we maintain the kApplicationLocale property in both local
 // state and the user's profile.  The global property determines the locale of
 // the login screen, while the user's profile determines their personal locale