Add an automatic settings reset banner.

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 eb49ed045061ace9fd0430350b8e743e4073c728..b0bde58fc30117e49a350eddbca95e1c3617b0ff 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2630,6 +2630,10 @@ const char kWatchdogExtensionActiveOld[] =
 // of Chrome.
 const char kProfilePreferenceHashes[] = "profile.preference_hashes";
 
+// A timestamp (stored in base::Time::ToInternalValue format) of the last time
+// a preference was reset.
+const char kProfilePreferenceResetTime[] = "profile.preference_reset_time";

[gab, 2014/02/05 15:23:52]

This the the local state section (profile prefs are between line 12 and 1318 --
obvious I know ;-)!).

Profile prefs do not need a "profile." prefix in their name either; consider
something like:

settings.last_reset_time

[robertshield, 2014/02/06 18:56:50]

This is a local state pref as discussed. Will keep it there for now, and leave a
todo for Erik to store it in the same place as tracked preferences.

[gab, 2014/02/06 20:40:11]

You didn't actually leave it here :).

[robertshield, 2014/02/07 04:36:19]

Done.

+
 // Stores a pair of local time and corresponding network time to bootstrap
 // network time tracker when browser starts.
 const char kNetworkTimeMapping[] = "profile.network_time_mapping";