Generalize the net module's LoadLog facility from a passive container, to an event stream (NetLog).

net/url_request/url_request_context.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.
 
 // This class represents contextual information (cookies, cache, etc.)
 // that's useful when processing resource requests.
 // The class is reference-counted so that it can be cleaned up after any
 // requests that are using it have been completed.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_CONTEXT_H_
 #define NET_URL_REQUEST_URL_REQUEST_CONTEXT_H_
 
 #include "base/ref_counted.h"
 #include "base/string_util.h"
 #include "net/base/cookie_store.h"
 #include "net/base/host_resolver.h"
+#include "net/base/net_log.h"
 #include "net/base/ssl_config_service.h"
 #include "net/base/transport_security_state.h"
 #include "net/ftp/ftp_auth_cache.h"
 #include "net/proxy/proxy_service.h"
-#include "net/url_request/request_tracker.h"
 
 namespace net {
 class CookiePolicy;
 class FtpTransactionFactory;
 class HttpAuthHandlerFactory;
 class HttpTransactionFactory;
 class SocketStream;
 }
 class URLRequest;
 
 // Subclass to provide application-specific context for URLRequest instances.
 class URLRequestContext :
     public base::RefCountedThreadSafe<URLRequestContext> {
  public:
   URLRequestContext()
-      : http_transaction_factory_(NULL),
+      : net_log_(NULL),
+        http_transaction_factory_(NULL),
         ftp_transaction_factory_(NULL),
         cookie_policy_(NULL),
         transport_security_state_(NULL) {
   }
 
+  net::NetLog* net_log() const {
+    return net_log_;
+  }
+
   net::HostResolver* host_resolver() const {
     return host_resolver_;
   }
 
   // Get the proxy service for this context.
   net::ProxyService* proxy_service() const {
     return proxy_service_;
   }
 
   // Get the ssl config service for this context.
@@ skipping 30 matching lines @@
   net::HttpAuthHandlerFactory* http_auth_handler_factory() {
     return http_auth_handler_factory_;
   }
 
   // Gets the value of 'Accept-Charset' header field.
   const std::string& accept_charset() const { return accept_charset_; }
 
   // Gets the value of 'Accept-Language' header field.
   const std::string& accept_language() const { return accept_language_; }
 
-  // Gets the tracker for URLRequests associated with this context.
-  RequestTracker<URLRequest>* url_request_tracker() {
-    return &url_request_tracker_;
-  }
-
-  // Gets the tracker for SocketStreams associated with this context.
-  RequestTracker<net::SocketStream>* socket_stream_tracker() {
-    return &socket_stream_tracker_;
-  }
-
   // Gets the UA string to use for the given URL.  Pass an invalid URL (such as
   // GURL()) to get the default UA string.  Subclasses should override this
   // method to provide a UA string.
   virtual const std::string& GetUserAgent(const GURL& url) const {
     return EmptyString();
   }
 
   // In general, referrer_charset is not known when URLRequestContext is
   // constructed. So, we need a setter.
   const std::string& referrer_charset() const { return referrer_charset_; }
@@ skipping 15 matching lines @@
     return true;
   }
 
  protected:
   friend class base::RefCountedThreadSafe<URLRequestContext>;
 
   virtual ~URLRequestContext() {}
 
   // The following members are expected to be initialized and owned by
   // subclasses.
+  net::NetLog* net_log_;
   scoped_refptr<net::HostResolver> host_resolver_;
   scoped_refptr<net::ProxyService> proxy_service_;
   scoped_refptr<net::SSLConfigService> ssl_config_service_;
   net::HttpTransactionFactory* http_transaction_factory_;
   net::FtpTransactionFactory* ftp_transaction_factory_;
   net::HttpAuthHandlerFactory* http_auth_handler_factory_;
   scoped_refptr<net::CookieStore> cookie_store_;
   net::CookiePolicy* cookie_policy_;
   scoped_refptr<net::TransportSecurityState> transport_security_state_;
   net::FtpAuthCache ftp_auth_cache_;
   std::string accept_language_;
   std::string accept_charset_;
   // The charset of the referrer where this request comes from. It's not
   // used in communication with a server but is used to construct a suggested
   // filename for file download.
   std::string referrer_charset_;
 
-  // Tracks the requests associated with this context.
-  RequestTracker<URLRequest> url_request_tracker_;
-
-  // Trakcs the socket streams associated with this context.
-  RequestTracker<net::SocketStream> socket_stream_tracker_;
-
  private:
   DISALLOW_COPY_AND_ASSIGN(URLRequestContext);
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_H_