Implement new network change notifier that uses NetworkStateHandler

net/base/network_change_notifier_chromeos.h

Index: net/base/network_change_notifier_chromeos.h
diff --git a/net/base/network_change_notifier_chromeos.h b/net/base/network_change_notifier_chromeos.h
new file mode 100644
index 0000000000000000000000000000000000000000..bcb2e2ce2e5428581934d391b715e98657f50540
--- /dev/null
+++ b/net/base/network_change_notifier_chromeos.h
@@ -0,0 +1,94 @@
+// 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 CHROMEOS_NETWORK_CONNECTION_CHANGE_NOTIFIER_H_
+#define CHROMEOS_NETWORK_CONNECTION_CHANGE_NOTIFIER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "chromeos/network/network_state_handler_observer.h"
+#include "net/base/net_export.h"
+#include "net/base/network_change_notifier.h"
+#include "net/dns/dns_config_service_posix.h"
+
+namespace net {
+
+class NET_EXPORT_PRIVATE NetworkChangeNotifierChromeos
+    : public NetworkChangeNotifier,
+      public chromeos::NetworkStateHandlerObserver {
+ public:
+  NetworkChangeNotifierChromeos();
+  virtual ~NetworkChangeNotifierChromeos();
+
+  // Initialize the connection change notifier. Start observing
+  // changes from the network state handler.

[stevenjb, 2012/12/13 19:28:22]

Simplify to: Starts observing changes from the network state handler.
(Initialize is obvious from the name).

[gauravsh, 2012/12/15 00:42:45]

Done.

+  void Initialize();
+
+  // Shutdown the connection change notifier. Stop observing
+  // changes from the network state handler.

[stevenjb, 2012/12/13 19:28:22]

dito. s/Stop/Stops

[gauravsh, 2012/12/15 00:42:45]

Done.

+  void Shutdown();
+
+  // NetworkChangeNotifier overrides.
+  NetworkChangeNotifier::ConnectionType
+      GetCurrentConnectionType() const OVERRIDE;
+
+  // NetworkStateHandlerObserver overrides.
+  void ActiveNetworkChanged(
+      const chromeos::NetworkState* active_network) OVERRIDE;
+  void ActiveNetworkStateChanged(
+      const chromeos::NetworkState* active_network) OVERRIDE;
+
+ private:
+  friend class NetworkChangeNotifierChromeosUpdateTest;
+
+  class DnsConfigService : public net::internal::DnsConfigServicePosix {

[stevenjb, 2012/12/13 19:28:22]

We can define this only in the .cc file and forward declare it here. Also it
should have a comment describing the class.

[gauravsh, 2012/12/15 00:42:45]

Done.

+   public:
+    DnsConfigService();
+    virtual ~DnsConfigService();
+
+    // net::internal::DnsConfigService() overrides.
+    virtual bool StartWatching() OVERRIDE;
+
+    virtual void OnNetworkChange();
+  };
+
+  // Updates the state based on an active network update.
+  // |connection_type_changed| is set to true if we must report a connection
+  // type change.
+  // |ip_address_changed| is set to true if we must report an IP address change.
+  // |dns_changed| is set to true if we must report a DNS config change.
+  void UpdateActiveNetwork(const chromeos::NetworkState* active_network,

[stevenjb, 2012/12/13 19:28:22]

It looks like this doesn't actually do any updating, just sets *changed? We
should probably rename this to something like "GetChangesForActiveNetwork".

[gauravsh, 2012/12/15 00:42:45]

Changed this to UpdateState(), since it's changing notifier state based on the
active n/w update.

+                           bool* connection_type_changed,
+                           bool* ip_address_changed,
+                           bool* dns_changed);
+
+  // Maps the shill network type and technology to its NetworkChangeNotifier
+  // equivalent.
+  static NetworkChangeNotifier::ConnectionType
+      ConnectionTypeFromShill(const std::string& type,
+                              const std::string& technology);
+
+  // Calculates parameters used for network change notifier online/offline
+  // signals.
+  static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsChromeos();
+
+  NetworkChangeNotifier::ConnectionType connection_type_;

[stevenjb, 2012/12/13 19:28:22]

We should be consistent with whether or not we use the NetworkChangeNotifier::
qualifier here. We should either use it fin front of
NetworkChangeCalculatorParams, or remove it before ConnectionType here and
elsewhere. (I think that removing it is fine and more common).

[gauravsh, 2012/12/15 00:42:45]

Made it consistent. I prefer the qualifier because there are plenty of name
collisions (NetworkState in chromeos:: and net::, ConnectionType in chromeos::
and net::).

+  // IP address for the current active network.
+  std::string ip_address_;
+  // Service path for the current active network.
+  std::string service_path_;
+
+  scoped_ptr<DnsConfigService> dns_config_service_;
+
+  FRIEND_TEST_ALL_PREFIXES(NetworkChangeNotifierChromeosTest,
+                           ConnectionTypeFromShill);

[stevenjb, 2012/12/13 19:28:22]

FRIEND* should be just below private

[gauravsh, 2012/12/15 00:42:45]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierChromeos);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_CONNECTION_CHANGE_NOTIFIER_H_