Provide access to recommended pref values

chrome/browser/prefs/pref_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prefs/pref_service.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 977 matching lines @@
   if (pref_value_store()->GetValue(name_, type_, &found_value)) {
     DCHECK(found_value->IsType(type_));
     return found_value;
   }
 
   // Every registered preference has at least a default value.
   NOTREACHED() << "no valid value found for registered pref " << name_;
   return NULL;
 }
 
+const Value* PrefService::Preference::GetRecommendedValue() const {
+  DCHECK(pref_service_->FindPreference(name_.c_str())) <<
+      "Must register pref before getting its value";
+
+  const Value* found_value = NULL;
+  if (pref_value_store()->GetRecommendedValue(name_, type_, &found_value)) {
+    DCHECK(found_value->IsType(type_));
+    return found_value;
+  }
+
+  // The pref has no recommended value.
+  return NULL;
+}
+
 bool PrefService::Preference::IsManaged() const {
   return pref_value_store()->PrefValueInManagedStore(name_.c_str());
 }
 
 bool PrefService::Preference::IsRecommended() const {
   return pref_value_store()->PrefValueFromRecommendedStore(name_.c_str());
 }
 
 bool PrefService::Preference::HasExtensionSetting() const {
   return pref_value_store()->PrefValueInExtensionStore(name_.c_str());
@@ skipping 15 matching lines @@
   return pref_value_store()->PrefValueFromDefaultStore(name_.c_str());
 }
 
 bool PrefService::Preference::IsUserModifiable() const {
   return pref_value_store()->PrefValueUserModifiable(name_.c_str());
 }
 
 bool PrefService::Preference::IsExtensionModifiable() const {
   return pref_value_store()->PrefValueExtensionModifiable(name_.c_str());
 }