Added an error message when local state corruption is detected.

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 81b2c6670c8f92deaf05cf5067846753f6acb13f..bd00998e52c80fb70a8a0c6705a85e3fbeea114d 100644
--- a/chrome/browser/prefs/chrome_pref_service_factory.cc
+++ b/chrome/browser/prefs/chrome_pref_service_factory.cc
@@ -307,9 +307,13 @@ GetTrackingConfiguration() {
   return result;
 }
 
-
 // Shows notifications which correspond to PersistentPrefStore's reading errors.
 void HandleReadError(PersistentPrefStore::PrefReadError error) {
+  if (error != PersistentPrefStore::PREF_READ_ERROR_NONE &&
+      error != PersistentPrefStore::PREF_READ_ERROR_NO_FILE) {
+    LOG(ERROR) << "An error happened during prefs loading: " << error;
+  }
+
   // Sample the histogram also for the successful case in order to get a
   // baseline on the success rate in addition to the error distribution.
   UMA_HISTOGRAM_ENUMERATION("PrefService.ReadError", error,