Add support for int64 and uint64 in values.h's API.

chrome/browser/prefs/pref_hash_filter.cc

Index: chrome/browser/prefs/pref_hash_filter.cc
diff --git a/chrome/browser/prefs/pref_hash_filter.cc b/chrome/browser/prefs/pref_hash_filter.cc
index e35df37edb45769367d2673f109a1097ab88b4e1..bf6e70081d7cea70dce7ceaf9ed565651b26fc5e 100644
--- a/chrome/browser/prefs/pref_hash_filter.cc
+++ b/chrome/browser/prefs/pref_hash_filter.cc
@@ -64,26 +64,15 @@ PrefHashFilter::~PrefHashFilter() {
 void PrefHashFilter::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   // See GetResetTime for why this is a StringPref and not Int64Pref.
-  registry->RegisterStringPref(
+  registry->RegisterInt64Pref(
       prefs::kPreferenceResetTime,
-      base::Int64ToString(base::Time().ToInternalValue()),
+      base::Time().ToInternalValue(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 // static
 base::Time PrefHashFilter::GetResetTime(PrefService* user_prefs) {
-  // Provide our own implementation (identical to the PrefService::GetInt64) in
-  // order to ensure it remains consistent with the way we store this value
-  // (which we do via a PrefStore, preventing us from reusing
-  // PrefService::SetInt64).
-  int64 internal_value = base::Time().ToInternalValue();
-  if (!base::StringToInt64(
-          user_prefs->GetString(prefs::kPreferenceResetTime),
-          &internal_value)) {
-    // Somehow the value stored on disk is not a valid int64.
-    NOTREACHED();
-    return base::Time();
-  }
+  int64 internal_value = user_prefs->GetInt64(prefs::kPreferenceResetTime);
   return base::Time::FromInternalValue(internal_value);
 }
 
@@ -170,9 +159,8 @@ bool PrefHashFilter::FilterOnLoad(base::DictionaryValue* pref_store_contents) {
   }
 
   if (did_reset) {
-    pref_store_contents->Set(prefs::kPreferenceResetTime,
-                             new base::StringValue(base::Int64ToString(
-                                 base::Time::Now().ToInternalValue())));
+    pref_store_contents->SetInt64(prefs::kPreferenceResetTime,
+                                  base::Time::Now().ToInternalValue());
   }
 
   // TODO(gab): Remove this histogram by Feb 21 2014; after sufficient timing