Allow ProxyService to share URLRequestContext with everything else.

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 <stddef.h>
 
 #include <memory>
@@ skipping 207 matching lines @@
   LoadState GetLoadState(const PacRequest* pac_request) const;
 
   // Sets the ProxyScriptFetcher and DhcpProxyScriptFetcher dependencies. This
   // is needed if the ProxyResolver is of type ProxyResolverWithoutFetch.
   // ProxyService takes ownership of proxy_script_fetcher.
   void SetProxyScriptFetchers(
       ProxyScriptFetcher* proxy_script_fetcher,
       std::unique_ptr<DhcpProxyScriptFetcher> dhcp_proxy_script_fetcher);
   ProxyScriptFetcher* GetProxyScriptFetcher() const;
 
+  // Cancels all network requests, and prevents the service from creating new
+  // ones.  Must be called before the URLRequestContext the ProxyService was
+  // created with is torn down, if it's torn down before th ProxyService itself.
+  void OnShutdown();
+
   // Tells this ProxyService to start using a new ProxyConfigService to
   // retrieve its ProxyConfig from. The new ProxyConfigService will immediately
   // be queried for new config info which will be used for all subsequent
   // ResolveProxy calls.
   void ResetConfigService(
       std::unique_ptr<ProxyConfigService> new_proxy_config_service);
 
   // Returns the last configuration fetched from ProxyConfigService.
   const ProxyConfig& fetched_config() {
     return fetched_config_;
@@ skipping 241 matching lines @@
 
   // The method to use for sanitizing URLs seen by the proxy resolver.
   SanitizeUrlPolicy sanitize_url_policy_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_