Allow ProxyConfigService to report "no configuration set"

net/proxy/proxy_config_service_mac.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 "net/proxy/proxy_config_service_mac.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <SystemConfiguration/SystemConfiguration.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 191 matching lines @@
 void ProxyConfigServiceMac::AddObserver(Observer* observer) {
   DCHECK_EQ(io_loop_, MessageLoop::current());
   observers_.AddObserver(observer);
 }
 
 void ProxyConfigServiceMac::RemoveObserver(Observer* observer) {
   DCHECK_EQ(io_loop_, MessageLoop::current());
   observers_.RemoveObserver(observer);
 }
 
-bool ProxyConfigServiceMac::GetLatestProxyConfig(ProxyConfig* config) {
+net::ProxyConfigService::ConfigAvailability
+    ProxyConfigServiceMac::GetLatestProxyConfig(ProxyConfig* config) {
   DCHECK_EQ(io_loop_, MessageLoop::current());
 
   // Lazy-initialize by fetching the proxy setting from this thread.
   if (!has_fetched_config_) {
     GetCurrentProxyConfig(&last_config_fetched_);
     has_fetched_config_ = true;
   }
 
   *config = last_config_fetched_;
-  return has_fetched_config_;
+  return has_fetched_config_ ? CONFIG_VALID : CONFIG_PENDING;
 }
 
 void ProxyConfigServiceMac::SetDynamicStoreNotificationKeys(
     SCDynamicStoreRef store) {
   // Called on notifier thread.
 
   CFStringRef proxies_key = SCDynamicStoreKeyCreateProxies(NULL);
   CFArrayRef key_array = CFArrayCreate(
       NULL, (const void **)(&proxies_key), 1, &kCFTypeArrayCallBacks);
 
@@ skipping 21 matching lines @@
 
 void ProxyConfigServiceMac::OnProxyConfigChanged(
     const ProxyConfig& new_config) {
   DCHECK_EQ(io_loop_, MessageLoop::current());
 
   // Keep track of the last value we have seen.
   has_fetched_config_ = true;
   last_config_fetched_ = new_config;
 
   // Notify all the observers.
-  FOR_EACH_OBSERVER(Observer, observers_, OnProxyConfigChanged(new_config));
+  FOR_EACH_OBSERVER(Observer, observers_,
+                    OnProxyConfigChanged(new_config, CONFIG_VALID));
 }
 
 }  // namespace net