Implement URLRequestBackoffManager for managing Backoff headers

net/url_request/url_request_context.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.
 
 // 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_
@@ skipping 23 matching lines @@
 class FraudulentCertificateReporter;
 class HostResolver;
 class HttpAuthHandlerFactory;
 class HttpTransactionFactory;
 class HttpUserAgentSettings;
 class NetworkDelegate;
 class NetworkQualityEstimator;
 class SdchManager;
 class ProxyService;
 class URLRequest;
+class URLRequestBackoffManager;
 class URLRequestJobFactory;
 class URLRequestThrottlerManager;
 
 // Subclass to provide application-specific context for URLRequest
 // instances. Note that URLRequestContext typically does not provide storage for
 // these member variables, since they may be shared. For the ones that aren't
 // shared, URLRequestContextStorage can be helpful in defining their storage.
 class NET_EXPORT URLRequestContext
     : NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
@@ skipping 122 matching lines @@
   }
 
   // May return nullptr.
   URLRequestThrottlerManager* throttler_manager() const {
     return throttler_manager_;
   }
   void set_throttler_manager(URLRequestThrottlerManager* throttler_manager) {
     throttler_manager_ = throttler_manager;
   }
 
+  // May be NULL.

[cpu_(ooo_6.6-7.5), 2015/07/17 19:56:01]

this comment should be the same style as 179 or 193

[xunjieli, 2015/07/20 20:02:13]

Done.

+  URLRequestBackoffManager* backoff_manager() const { return backoff_manager_; }
+  void set_backoff_manager(URLRequestBackoffManager* backoff_manager) {
+    backoff_manager_ = backoff_manager;
+  }
+
   // May return nullptr.
   SdchManager* sdch_manager() const { return sdch_manager_; }
   void set_sdch_manager(SdchManager* sdch_manager) {
     sdch_manager_ = sdch_manager;
   }
 
   // Gets the URLRequest objects that hold a reference to this
   // URLRequestContext.
   std::set<const URLRequest*>* url_requests() const {
     return url_requests_.get();
@@ skipping 42 matching lines @@
   scoped_refptr<SSLConfigService> ssl_config_service_;
   NetworkDelegate* network_delegate_;
   base::WeakPtr<HttpServerProperties> http_server_properties_;
   HttpUserAgentSettings* http_user_agent_settings_;
   scoped_refptr<CookieStore> cookie_store_;
   TransportSecurityState* transport_security_state_;
   CTVerifier* cert_transparency_verifier_;
   HttpTransactionFactory* http_transaction_factory_;
   const URLRequestJobFactory* job_factory_;
   URLRequestThrottlerManager* throttler_manager_;
+  URLRequestBackoffManager* backoff_manager_;
   SdchManager* sdch_manager_;
   NetworkQualityEstimator* network_quality_estimator_;
 
   // ---------------------------------------------------------------------------
   // Important: When adding any new members below, consider whether they need to
   // be added to CopyFrom.
   // ---------------------------------------------------------------------------
 
   scoped_ptr<std::set<const URLRequest*> > url_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestContext);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_H_