[Chromecast] Reland "Ignore interfaces not used to connect to internet."

Add NetworkChangeNotifierFactoryCast to create instance of
NetworkChangeNotifierLinux that ignores interfaces that will not be
used to connect to internet.

BUG=469863
R=gunsch@chromium.org

Review URL: https://codereview.chromium.org/1138923002

Cr-Commit-Position: refs/heads/master@{#329445}

chromecast/browser/cast_browser_main_parts.cc

@@ -50,6 +50,7 @@
 #include "net/android/network_change_notifier_factory_android.h"
 #else
 #include "chromecast/browser/media/cast_browser_cdm_factory.h"
+#include "chromecast/net/network_change_notifier_factory_cast.h"
 #endif
 
 #if defined(USE_AURA)
@@ -227,6 +228,9 @@ void CastBrowserMainParts::PreMainMessageLoopStart() {
 #if defined(OS_ANDROID)
   net::NetworkChangeNotifier::SetFactory(
       new net::NetworkChangeNotifierFactoryAndroid());
+#else
+  net::NetworkChangeNotifier::SetFactory(
+      new NetworkChangeNotifierFactoryCast());
 #endif  // defined(OS_ANDROID)
 }
 

chromecast/chromecast.gyp

@@ -103,6 +103,16 @@
         'net/connectivity_checker.h',
         'net/net_switches.cc',
         'net/net_switches.h',
+        'net/net_util_cast.cc',
+        'net/net_util_cast.h',
+      ],
+      'conditions': [
+        ['OS!="android"', {
+          'sources': [
+            'net/network_change_notifier_factory_cast.cc',
+            'net/network_change_notifier_factory_cast.h',
+          ],
+        }],
       ],
     },
     {

chromecast/net/net_util_cast.cc

+// Copyright 2015 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.
+
+#include "chromecast/net/net_util_cast.h"
+
+#include "base/command_line.h"
+#include "base/strings/string_split.h"
+#include "chromecast/base/cast_sys_info_util.h"
+#include "chromecast/net/net_switches.h"
+#include "chromecast/public/cast_sys_info.h"
+
+namespace chromecast {
+
+base::hash_set<std::string> GetIgnoredInterfaces() {
+  base::hash_set<std::string> ignored_interfaces;
+  scoped_ptr<CastSysInfo> sys_info = CreateSysInfo();
+  if (!sys_info->GetApInterface().empty())
+    ignored_interfaces.insert(sys_info->GetApInterface());
+
+  // Add interfaces from "netif-to-ignore" switch.
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  base::CommandLine::StringType netifs_to_ignore_str =
+      command_line->GetSwitchValueNative(switches::kNetifsToIgnore);
+  base::CommandLine::StringVector netifs_to_ignore_vector;
+  base::SplitString(netifs_to_ignore_str, ',', &netifs_to_ignore_vector);
+  for (const auto& netif : netifs_to_ignore_vector)
+    ignored_interfaces.insert(netif);
+
+  return ignored_interfaces;
+}
+
+}  // namespace chromecast

chromecast/net/net_util_cast.h

+// Copyright 2015 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 CHROMECAST_NET_NET_UTIL_H_
+#define CHROMECAST_NET_NET_UTIL_H_
+
+#include <string>
+
+#include "base/containers/hash_tables.h"
+
+namespace chromecast {
+
+// Gets the list of interfaces that should be ignored. The interfaces returned
+// by this function will not be used to connect to the internet.
+base::hash_set<std::string> GetIgnoredInterfaces();
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_NET_NET_UTIL_CAST_H_

chromecast/net/network_change_notifier_factory_cast.cc

+// Copyright 2015 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.
+
+#include "chromecast/net/network_change_notifier_factory_cast.h"
+
+#include "chromecast/net/net_util_cast.h"
+#include "net/base/network_change_notifier_linux.h"
+
+namespace chromecast {
+
+net::NetworkChangeNotifier* NetworkChangeNotifierFactoryCast::CreateInstance() {
+  // Caller assumes ownership.
+  return new net::NetworkChangeNotifierLinux(GetIgnoredInterfaces());
+}
+
+NetworkChangeNotifierFactoryCast::~NetworkChangeNotifierFactoryCast() {
+}
+
+}  // namespace chromecast

chromecast/net/network_change_notifier_factory_cast.h

+// Copyright 2015 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 CHROMECAST_NET_NETWORK_CHANGE_NOTIFIER_FACTORY_CAST_H_
+#define CHROMECAST_NET_NETWORK_CHANGE_NOTIFIER_FACTORY_CAST_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "net/base/network_change_notifier_factory.h"
+
+namespace chromecast {
+
+class NetworkChangeNotifierCast;
+
+class NetworkChangeNotifierFactoryCast
+    : public net::NetworkChangeNotifierFactory {
+ public:
+  NetworkChangeNotifierFactoryCast() {}
+  ~NetworkChangeNotifierFactoryCast() override;
+
+  // net::NetworkChangeNotifierFactory implementation:
+  net::NetworkChangeNotifier* CreateInstance() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierFactoryCast);
+};
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_NET_NETWORK_CHANGE_NOTIFIER_FACTORY_CAST_H_