Add some basic UMA for proxy service.

net/proxy/proxy_service.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_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 345 matching lines @@
   void RemovePendingRequest(PacRequest* req);
 
   // Called when proxy resolution has completed (either synchronously or
   // asynchronously). Handles logging the result, and cleaning out
   // bad entries from the results list.
   int DidFinishResolvingProxy(const GURL& url,
                               int load_flags,
                               NetworkDelegate* network_delegate,
                               ProxyInfo* result,
                               int result_code,
-                              const BoundNetLog& net_log);
+                              const BoundNetLog& net_log,
+                              base::TimeTicks start_time,
+                              bool script_executed);
 
   // Start initialization using |fetched_config_|.
   void InitializeUsingLastFetchedConfig();
 
   // Start the initialization skipping past the "decision" phase.
   void InitializeUsingDecidedConfig(
       int decider_result,
       ProxyResolverScriptData* script_data,
       const ProxyConfig& effective_config);
 
@@ skipping 72 matching lines @@
 
   // Whether child ProxyScriptDeciders should use QuickCheck
   bool quick_check_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_