Create component to expose network usage stats to consumers.

chrome/browser/io_thread.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.
 
 #ifndef CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 25 matching lines @@
 }
 
 namespace chrome_browser_net {
 class DnsProbeService;
 }
 
 namespace extensions {
 class EventRouterForwarder;
 }
 
+namespace data_usage {
+class DataUseAggregator;
+}
+
 namespace net {
 class CertPolicyEnforcer;
 class CertVerifier;
 class ChannelIDService;
 class CookieStore;
 class CTVerifier;
 class FtpTransactionFactory;
 class HostMappingRules;
 class HostResolver;
 class HttpAuthHandlerFactory;
@@ skipping 59 matching lines @@
       explicit SystemRequestContextLeakChecker(Globals* globals);
       ~SystemRequestContextLeakChecker();
 
      private:
       Globals* const globals_;
     };
 
     Globals();
     ~Globals();
 
+    // Global aggregator of data use. It must outlive the
+    // |system_network_delegate|.
+    scoped_ptr<data_usage::DataUseAggregator> data_use_aggregator;
     // The "system" NetworkDelegate, used for Profile-agnostic network events.
     scoped_ptr<net::NetworkDelegate> system_network_delegate;
     scoped_ptr<net::HostResolver> host_resolver;
     scoped_ptr<net::CertVerifier> cert_verifier;
     // The ChannelIDService must outlive the HttpTransactionFactory.
     scoped_ptr<net::ChannelIDService> system_channel_id_service;
     // This TransportSecurityState doesn't load or save any state. It's only
     // used to enforce pinning for system requests and will only use built-in
     // pins.
     scoped_ptr<net::TransportSecurityState> transport_security_state;
@@ skipping 372 matching lines @@
   bool is_quic_allowed_by_policy_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_