Allow ProxyConfigService to report "no configuration set"

chrome/browser/net/resolve_proxy_msg_helper_unittest.cc

Index: chrome/browser/net/resolve_proxy_msg_helper_unittest.cc
diff --git a/chrome/browser/net/resolve_proxy_msg_helper_unittest.cc b/chrome/browser/net/resolve_proxy_msg_helper_unittest.cc
index dffd0cfb59fb85b30612809e9c4789936edee451..bb3c1d83740c654ebb4ee1e99321e19b334a8a8a 100644
--- a/chrome/browser/net/resolve_proxy_msg_helper_unittest.cc
+++ b/chrome/browser/net/resolve_proxy_msg_helper_unittest.cc
@@ -16,9 +16,9 @@ class MockProxyConfigService : public net::ProxyConfigService {
  public:
   virtual void AddObserver(Observer* observer) {}
   virtual void RemoveObserver(Observer* observer) {}
-  virtual bool GetLatestProxyConfig(net::ProxyConfig* results) {
+  virtual ConfigAvailability GetLatestProxyConfig(net::ProxyConfig* results) {
     *results = net::ProxyConfig::CreateFromCustomPacURL(GURL("http://pac"));
-    return true;
+    return CONFIG_VALID;
   }
 };