Add HttpStreamFactory Job orphaning semantics.

net/http/http_stream_factory_impl_request.h

 // Copyright (c) 2011 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_HTTP_HTTP_STREAM_FACTORY_IMPL_REQUEST_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_REQUEST_H_
 
+#include <set>
 #include "base/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_log.h"
 #include "net/http/http_stream_factory_impl.h"
 
 namespace net {
 
 class HttpStreamFactoryImpl::Request : public HttpStreamRequest {
  public:
   Request(const GURL& url,
           HttpStreamFactoryImpl* factory,
           HttpStreamRequest::Delegate* delegate,
           const BoundNetLog& net_log);
   virtual ~Request();
 
-  // Returns the Job that the Request started up.
-  Job* job() const { return job_; }
-
   // The GURL from the HttpRequestInfo the started the Request.
   const GURL& url() const { return url_; }
 
   // Called when the Job determines the appropriate |spdy_session_key| for the
   // Request. Note that this does not mean that SPDY is necessarily supported
   // for this HostPortProxyPair, since we may need to wait for NPN to complete
   // before knowing if SPDY is available.
   void SetSpdySessionKey(const HostPortProxyPair& spdy_session_key);
 
-  // Binds |job| to this request.
-  void BindJob(HttpStreamFactoryImpl::Job* job);
+  // Attaches |job| to this request. Does not mean that Request will use |job|,
+  // but Request will own |job|.
+  void AttachJob(HttpStreamFactoryImpl::Job* job);
 
   // Marks completion of the request. Must be called before OnStreamReady().
   // |source| is the NetLog::Source generated by the Job that fulfilled this
   // request.
   void Complete(bool was_alternate_protocol_available,
                 bool was_npn_negotiated,
                 bool using_spdy,
                 const NetLog::Source& source);
 
   // If this Request has a spdy_session_key, remove this session from the
   // SpdySessionRequestMap.
   void RemoveRequestFromSpdySessionRequestMap();
 
+  // Called by an attached Job if it sets up a SpdySession.
+  void OnSpdySessionReady(Job* job,
+                          scoped_refptr<SpdySession> spdy_session,
+                          bool direct);
+
   // HttpStreamRequest::Delegate methods which we implement. Note we don't
   // actually subclass HttpStreamRequest::Delegate.
 
-  void OnStreamReady(const SSLConfig& used_ssl_config,
+  void OnStreamReady(Job* job,
+                     const SSLConfig& used_ssl_config,
                      const ProxyInfo& used_proxy_info,
                      HttpStream* stream);
-  void OnStreamFailed(int status, const SSLConfig& used_ssl_config);
-  void OnCertificateError(int status,
+  void OnStreamFailed(Job* job, int status, const SSLConfig& used_ssl_config);
+  void OnCertificateError(Job* job,
+                          int status,
                           const SSLConfig& used_ssl_config,
                           const SSLInfo& ssl_info);
-  void OnNeedsProxyAuth(const HttpResponseInfo& proxy_response,
+  void OnNeedsProxyAuth(Job* job,
+                        const HttpResponseInfo& proxy_response,
                         const SSLConfig& used_ssl_config,
                         const ProxyInfo& used_proxy_info,
                         HttpAuthController* auth_controller);
-  void OnNeedsClientAuth(const SSLConfig& used_ssl_config,
+  void OnNeedsClientAuth(Job* job,
+                         const SSLConfig& used_ssl_config,
                          SSLCertRequestInfo* cert_info);
   void OnHttpsProxyTunnelResponse(
+      Job *job,
       const HttpResponseInfo& response_info,
       const SSLConfig& used_ssl_config,
       const ProxyInfo& used_proxy_info,
       HttpStream* stream);
 
   // HttpStreamRequest methods.
 
   virtual int RestartTunnelWithProxyAuth(const string16& username,
                                          const string16& password);
   virtual LoadState GetLoadState() const;
   virtual bool was_alternate_protocol_available() const;
   virtual bool was_npn_negotiated() const;
   virtual bool using_spdy() const;
 
  private:
+  // Used to orphan all jobs in |jobs_| other than |job| which becomes "bound"
+  // to the request.
+  void OrphanJobsExcept(Job* job);
+
+  // Used to orphan all jobs in |jobs_|.
+  void OrphanJobs();
+
   const GURL url_;
   HttpStreamFactoryImpl* const factory_;
   HttpStreamRequest::Delegate* const delegate_;
   const BoundNetLog net_log_;
 
-  // The |job_| that this request is tied to.
-  HttpStreamFactoryImpl::Job* job_;
+  // At the point where Job is irrevocably tied to the Request, we set this.
+  scoped_ptr<Job> bound_job_;
+  std::set<HttpStreamFactoryImpl::Job*> jobs_;
   scoped_ptr<const HostPortProxyPair> spdy_session_key_;
 
   bool completed_;
   bool was_alternate_protocol_available_;
   bool was_npn_negotiated_;
   bool using_spdy_;
 
   DISALLOW_COPY_AND_ASSIGN(Request);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_