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 205 matching lines @@
 
   // Returns the LoadState for this |pac_request| which must be non-NULL.
   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 activity (including network requests), and causes new and
+  // in-progress resolutions to just hang. This is needed to breat the circular

[eroman, 2017/04/27 19:35:42]

breat -> break

+  // dependency when the ProxyService a URLRequestContext is using also uses

[eroman, 2017/04/27 19:35:42]

wording

+  // that URLRequestContext to make requests.
+  void ShutDown();
 
   // 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() {
@@ skipping 86 matching lines @@
   class InitProxyResolver;
   class ProxyScriptDeciderPoller;
 
   typedef std::set<scoped_refptr<PacRequest>> PendingRequests;
 
   enum State {
     STATE_NONE,
     STATE_WAITING_FOR_PROXY_CONFIG,
     STATE_WAITING_FOR_INIT_PROXY_RESOLVER,
     STATE_READY,
+    STATE_SHUTDOWN,
   };
 
   // Resets all the variables associated with the current proxy configuration,
   // and rewinds the current state to |STATE_NONE|. Returns the previous value
   // of |current_state_|.  If |reset_fetched_config| is true then
   // |fetched_config_| will also be reset, otherwise it will be left as-is.
   // Resetting it means that we will have to re-fetch the configuration from
   // the ProxyConfigService later.
   State ResetProxyConfig(bool reset_fetched_config);
 
@@ skipping 136 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_