Add an automatic settings reset banner.

chrome/browser/prefs/chrome_pref_service_factory.cc

Index: chrome/browser/prefs/chrome_pref_service_factory.cc
diff --git a/chrome/browser/prefs/chrome_pref_service_factory.cc b/chrome/browser/prefs/chrome_pref_service_factory.cc
index 877ab2771c272fa417865f2d2558ed3f7c66118c..aa601561a870a21f4837263d9555f6b8879e471c 100644
--- a/chrome/browser/prefs/chrome_pref_service_factory.cc
+++ b/chrome/browser/prefs/chrome_pref_service_factory.cc
@@ -16,6 +16,7 @@
 #include "base/prefs/pref_filter.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_registry.h"
+#include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_store.h"
 #include "base/prefs/pref_value_store.h"
@@ -23,6 +24,7 @@
 #include "chrome/browser/prefs/command_line_pref_store.h"
 #include "chrome/browser/prefs/pref_hash_filter.h"
 #include "chrome/browser/prefs/pref_hash_store.h"
+#include "chrome/browser/prefs/pref_hash_store_impl.h"
 #include "chrome/browser/prefs/pref_model_associator.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/prefs/pref_service_syncable_factory.h"
@@ -197,13 +199,20 @@ void HandleReadError(PersistentPrefStore::PrefReadError error) {
   }
 }
 
+void HandleResetEvent() {
+  g_browser_process->local_state()->SetInt64(
+      prefs::kProfilePreferenceResetTime,
+      base::Time::Now().ToInternalValue());
+}
+
 scoped_ptr<PrefHashFilter> CreatePrefHashFilter(
     scoped_ptr<PrefHashStore> pref_hash_store) {
   return make_scoped_ptr(new PrefHashFilter(pref_hash_store.Pass(),
                                             kTrackedPrefs,
                                             arraysize(kTrackedPrefs),
                                             kTrackedPrefsReportingIDsCount,
-                                            GetSettingsEnforcementLevel()));
+                                            GetSettingsEnforcementLevel(),
+                                            base::Bind(&HandleResetEvent)));
 }
 
 void PrepareBuilder(
@@ -359,4 +368,9 @@ void InitializeHashStoreForPrefFile(
   pref_store->ReadPrefsAsync(NULL);
 }
 
+void RegisterPrefs(PrefRegistrySimple* registry) {
+  PrefHashFilter::RegisterPrefs(registry);
+  PrefHashStoreImpl::RegisterPrefs(registry);
+}
+
 }  // namespace chrome_prefs