Test GURL::spec() usage changes with DEPS rolled to the new version.

net/proxy/proxy_config.h

 // 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.
 
 #ifndef NET_PROXY_PROXY_CONFIG_H_
 #define NET_PROXY_PROXY_CONFIG_H_
 #pragma once
 
 #include <string>
 
@@ skipping 128 matching lines @@
 
   ProxyRules& proxy_rules() {
     return proxy_rules_;
   }
 
   const ProxyRules& proxy_rules() const {
     return proxy_rules_;
   }
 
   void set_pac_url(const GURL& url) {
-    pac_url_ = url;
+    pac_url_ = url.is_valid() ? url : GURL();
   }
 
   const GURL& pac_url() const {
     return pac_url_;
   }
 
   void set_pac_mandatory(bool enable_pac_mandatory) {
     pac_mandatory_ = enable_pac_mandatory;
   }
 
@@ skipping 59 matching lines @@
   ProxyConfigSource source_;
 
   ID id_;
 };
 
 }  // namespace net
 
 
 
 #endif  // NET_PROXY_PROXY_CONFIG_H_