Created a new process type called the service process to host background task...

chrome/service/net/service_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.
+
+#ifndef CHROME_SERVICE_NET_SERVICE_URL_REQUEST_CONTEXT_H_
+#define CHROME_SERVICE_NET_SERVICE_URL_REQUEST_CONTEXT_H_
+
+#include <string>
+
+#include "base/message_loop_proxy.h"
+#include "chrome/common/net/url_request_context_getter.h"
+#include "net/base/cookie_monster.h"
+#include "net/base/cookie_policy.h"
+#include "net/base/host_resolver.h"
+#include "net/base/ssl_config_service_defaults.h"
+#include "net/disk_cache/disk_cache.h"
+#include "net/ftp/ftp_network_layer.h"
+#include "net/http/http_auth_handler_factory.h"
+#include "net/http/http_cache.h"
+#include "net/http/http_network_layer.h"
+#include "net/proxy/proxy_service.h"
+#include "net/url_request/url_request_context.h"
+
+// Subclass of URLRequestContext which can be used to store extra information
+// for requests. This subclass is meant to be used in the service process where
+// the profile is not available.
+//
+class ServiceURLRequestContext : public URLRequestContext {
+ public:
+  ServiceURLRequestContext();
+  void set_cookie_policy(net::CookiePolicy* policy) {
+    cookie_policy_ = policy;
+  }
+  void set_user_agent(const std::string& ua) {
+    user_agent_ = ua;
+  }
+
+  // URLRequestContext overrides
+  virtual const std::string& GetUserAgent(const GURL& url) const {
+    // If the user agent is set explicitly return that, otherwise call the
+    // base class method to return default value.
+    return user_agent_.empty() ?
+        URLRequestContext::GetUserAgent(url) : user_agent_;
+  }
+
+ protected:
+  virtual ~ServiceURLRequestContext();
+
+ private:
+  std::string user_agent_;
+};
+
+class ServiceURLRequestContextGetter : public URLRequestContextGetter {
+ public:
+  ServiceURLRequestContextGetter();
+
+  virtual URLRequestContext* GetURLRequestContext() {
+    if (!url_request_context_)
+      url_request_context_ = new ServiceURLRequestContext();
+    return url_request_context_;
+  }
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
+    return io_message_loop_proxy_;
+  }
+
+  void set_user_agent(const std::string& ua) {
+    user_agent_ = ua;
+  }
+ private:
+  ~ServiceURLRequestContextGetter() {}
+
+  std::string user_agent_;
+  scoped_refptr<URLRequestContext> url_request_context_;
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+};
+
+#endif  // CHROME_SERVICE_NET_SERVICE_URL_REQUEST_CONTEXT_H_
+