Remove kDistroDict from Preferences.

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 666c385b20b76e6550197b2f6ae6a7009b3c1f02..489f0f260d44d2e96f464ec93e3efa0197c5372c 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -189,6 +189,11 @@ const char kSupervisedUserSharedSettings[] = "profile.managed.shared_settings";
 // (currently the name).
 const char kSupervisedUserWhitelists[] = "profile.managed.whitelists";
 
+#if BUILDFLAG(ENABLE_RLZ)
+// Integer. RLZ ping delay in seconds.

[grt (UTC plus 2), 2017/02/24 07:42:21]

i think it's actually milliseconds -- see chrome_browser_main.cc and
user_session_manager.cc.

[Roger Tawa OOO till Jul 10th, 2017/02/24 16:02:18]

As mentioned already earlier, let's keep the second definition since there is
documentation that talks about this and existing master_prefs.  Let's change
those two call sites.

[gab, 2017/02/28 19:54:45]

Acknowledged.

+const char kRlzPingDelay[] = "rlz_ping_delay";
+#endif  // BUILDFLAG(ENABLE_RLZ)
+
 // The application locale.
 // For OS_CHROMEOS we maintain the kApplicationLocale property in both local
 // state and the user's profile.  The global property determines the locale of