Don't clear the net predictors prefs on startup

chrome/browser/net/predictor.h

Index: chrome/browser/net/predictor.h
diff --git a/chrome/browser/net/predictor.h b/chrome/browser/net/predictor.h
index a0dbec34f9f0359b18e3bb5ec7f3c9cc0cbbd72b..8a9933ffb36d4dd2cc44c4b109b829041a59e4e4 100644
--- a/chrome/browser/net/predictor.h
+++ b/chrome/browser/net/predictor.h
@@ -174,6 +174,10 @@ class Predictor {
   // (cache hits etc.).
   void DiscardAllResults();
 
+  // Clears the preferences used by the predictor. Must be called on the UI
+  // thread.
+  void ClearPrefsOnUIThread();
+
   // Add hostname(s) to the queue for processing.
   void ResolveList(const std::vector<GURL>& urls,
                    UrlInfo::ResolutionMotivation motivation);
@@ -213,13 +217,11 @@ class Predictor {
   // values into the current referrer list.
   void DeserializeReferrers(const base::ListValue& referral_list);
 
-  void DeserializeReferrersThenDelete(base::ListValue* referral_list);
-
   void DiscardInitialNavigationHistory();
 
   void FinalizeInitializationOnIOThread(
       const std::vector<GURL>& urls_to_prefetch,
-      base::ListValue* referral_list,
+      const base::ListValue* referral_list,
       IOThread* io_thread,
       ProfileIOData* profile_io_data);