PART1: Initiated the SignedSettings refactoring.

chrome/browser/chromeos/proxy_cros_settings_provider.cc

Index: chrome/browser/chromeos/proxy_cros_settings_provider.cc
diff --git a/chrome/browser/chromeos/proxy_cros_settings_provider.cc b/chrome/browser/chromeos/proxy_cros_settings_provider.cc
index 58fb046390e93449a8a1eaae8b12c4c5ba9a920b..3e20ddceea3b4154201cf54e81cd913cd5ce76f5 100644
--- a/chrome/browser/chromeos/proxy_cros_settings_provider.cc
+++ b/chrome/browser/chromeos/proxy_cros_settings_provider.cc
@@ -231,10 +231,8 @@ void ProxyCrosSettingsProvider::DoSet(const std::string& path,
   }
 }
 
-bool ProxyCrosSettingsProvider::Get(const std::string& path,
-                                    Value** out_value) const {
+const Value* ProxyCrosSettingsProvider::Get(const std::string& path) const {
   bool found = false;
-  bool managed = false;
   Value* data = NULL;
   chromeos::ProxyConfigServiceImpl* config_service = GetConfigService();
   chromeos::ProxyConfigServiceImpl::ProxyConfig config;
@@ -303,21 +301,23 @@ bool ProxyCrosSettingsProvider::Get(const std::string& path,
     for (size_t x = 0; x < bypass_rules.size(); x++) {
       list->Append(Value::CreateStringValue(bypass_rules[x]->ToString()));
     }
-    *out_value = list;
-    return true;
+    return list;
   }
   if (found) {
-    DictionaryValue* dict = new DictionaryValue;
     if (!data)
       data = Value::CreateStringValue("");
-    dict->Set("value", data);
-    dict->SetBoolean("managed", managed);
-    *out_value = dict;
-    return true;
-  } else {
-    *out_value = NULL;
-    return false;
+    return data;
   }
+  return NULL;
+}
+
+bool ProxyCrosSettingsProvider::GetTrusted(
+    const std::string& path,
+    const base::Closure& callback) const {
+  // This will bounce the query to UserCrosSettingsProvider until
+  // ProxyConfigService can report this too.
+  // TODO(pastarmovj): Extend ProxyConfigService to support this kind of query.
+  return CrosSettings::Get()->GetTrusted(kAccountsPrefAllowGuest, callback);

[Mattias Nissler (ping if slow), 2011/09/26 17:26:37]

This is not correct either, since we might also be waiting from flimflam. Can
you just put a NOTREACHED() for now and fix the TODO soonish?

[pastarmovj, 2011/09/29 15:15:03]

Done.

 }
 
 bool ProxyCrosSettingsProvider::HandlesSetting(const std::string& path) const {