Add the capability to run multiple proxy PAC scripts in parallel....

net/proxy/sync_host_resolver_bridge.h

 // Copyright (c) 2010 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_SYNC_HOST_RESOLVER_BRIDGE_H_
 #define NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_
 
 #include "base/scoped_ptr.h"
 #include "net/base/host_resolver.h"
-#include "net/proxy/single_threaded_proxy_resolver.h"
 
 class MessageLoop;
 
 namespace net {
 
 // Wrapper around HostResolver to give a sync API while running the resolver
 // in async mode on |host_resolver_loop|.
 class SyncHostResolverBridge : public HostResolver {
  public:
   SyncHostResolverBridge(HostResolver* host_resolver,
                          MessageLoop* host_resolver_loop);
 
   virtual ~SyncHostResolverBridge();
 
   // HostResolver methods:
   virtual int Resolve(const RequestInfo& info,
                       AddressList* addresses,
                       CompletionCallback* callback,
                       RequestHandle* out_req,
                       const BoundNetLog& net_log);
   virtual void CancelRequest(RequestHandle req);
   virtual void AddObserver(Observer* observer);
   virtual void RemoveObserver(Observer* observer);
 
   // The Shutdown() method should be called prior to destruction, from
   // |host_resolver_loop_|. It aborts any in progress synchronous resolves, to
   // prevent deadlocks from happening.
-  void Shutdown();
+  virtual void Shutdown();
 
  private:
   class Core;
 
   MessageLoop* const host_resolver_loop_;
   scoped_refptr<Core> core_;
 };
 
-// Subclass of SingleThreadedProxyResolver that additionally calls
-// |bridged_host_resolver_->Shutdown()| during its destructor.
-class SingleThreadedProxyResolverUsingBridgedHostResolver
-    : public SingleThreadedProxyResolver {
- public:
-  SingleThreadedProxyResolverUsingBridgedHostResolver(
-      ProxyResolver* proxy_resolver,
-      SyncHostResolverBridge* bridged_host_resolver);
-
-  virtual ~SingleThreadedProxyResolverUsingBridgedHostResolver();
-
- private:
-  scoped_refptr<SyncHostResolverBridge> bridged_host_resolver_;
-};
-
-
 }  // namespace net
 
 #endif  // NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_