Remove NetworkMonitorIos.

Network monitor for iOS is implemented in libwebrtc.
https://webrtc.googlesource.com/src/+/ea7fbfb9665bfa5e01ea375df94cc4421c8655ef

Author: jianjunz

talk/owt/BUILD.gn

@@ -178,18 +178,14 @@ static_library("owt_sdk_base") {
       include_dirs += [ owt_quic_header_root ]
     }
   }
-  
+
   if (is_win || is_linux) {
     # Custom audio/video input and output.
     # When rebasing libwebrtc to a new version, custom audio/video input/output
     # usually need some changes to fit the latest API.
     defines += [ "OWT_CUSTOM_AVIO" ]
   }
   if (is_ios) {
-    sources += [
-      "sdk/base/ios/networkmonitorios.cc",
-      "sdk/base/ios/networkmonitorios.h",
-    ]
     public_deps += [ "//third_party/webrtc/sdk:framework_objc+link" ]
   }
   if (is_win) {

talk/owt/sdk/base/ios/networkmonitorios.cc

@@ -37,11 +37,6 @@ bool PeerConnectionChannel::InitializePeerConnection() {
     return false;
   }
   RTC_CHECK(peer_connection_);
-  rtc::NetworkMonitorInterface* network_monitor = factory_->NetworkMonitor();
-  if (network_monitor) {
-    network_monitor->SignalNetworksChanged.connect(
-        this, &PeerConnectionChannel::OnNetworksChanged);
-  }
   return true;
 }
 void PeerConnectionChannel::ApplyBitrateSettings() {

talk/owt/sdk/base/ios/networkmonitorios.h

@@ -27,7 +27,6 @@
 #elif defined(WEBRTC_LINUX)
 #include "talk/owt/sdk/base/linux/msdkvideodecoderfactory.h"
 #elif defined(WEBRTC_IOS)
-#include "talk/owt/sdk/base/ios/networkmonitorios.h"
 #include "talk/owt/sdk/base/objc/ObjcVideoCodecFactory.h"
 #endif
 #if defined(WEBRTC_LINUX) || defined(WEBRTC_WIN)
@@ -58,9 +57,6 @@ PeerConnectionDependencyFactory::PeerConnectionDependencyFactory()
   } else {
     render_hardware_acceleration_enabled_ = false;
   }
-#endif
-#if defined(WEBRTC_IOS)
-  network_monitor_ = nullptr;
 #endif
   encoded_frame_ = GlobalConfiguration::GetEncodedVideoFrameEnabled();
   pc_thread_->SetName("peerconnection_dependency_factory_thread", nullptr);
@@ -290,27 +286,6 @@ rtc::scoped_refptr<PeerConnectionFactoryInterface>
 PeerConnectionDependencyFactory::PeerConnectionFactory() const {
   return pc_factory_;
 }
-rtc::NetworkMonitorInterface*
-PeerConnectionDependencyFactory::NetworkMonitor() {
-#if defined(WEBRTC_IOS)
-  pc_thread_->Invoke<void>(
-      RTC_FROM_HERE,
-      Bind(
-          &PeerConnectionDependencyFactory::CreateNetworkMonitorOnCurrentThread,
-          this));
-  return network_monitor_;
-#else
-  return nullptr;
-#endif
-}
-void PeerConnectionDependencyFactory::CreateNetworkMonitorOnCurrentThread() {
-#if defined(WEBRTC_IOS)
-  if (!network_monitor_) {
-    network_monitor_ = new NetworkMonitorIos();
-    network_monitor_->Start();
-  }
-#endif
-}
 
 #if defined(WEBRTC_WIN) || defined(WEBRTC_LINUX)
 scoped_refptr<webrtc::AudioDeviceModule> PeerConnectionDependencyFactory::

talk/owt/sdk/base/ios/readme.md

@@ -54,7 +54,6 @@ class PeerConnectionDependencyFactory : public rtc::RefCountInterface {
       webrtc::VideoTrackSourceInterface* video_source);
   rtc::scoped_refptr<AudioSourceInterface> CreateAudioSource(
       const cricket::AudioOptions& options);
-  rtc::NetworkMonitorInterface* NetworkMonitor();
   // Returns current |pc_factory_|.
   rtc::scoped_refptr<PeerConnectionFactoryInterface> PeerConnectionFactory()
       const;
@@ -72,7 +71,6 @@ class PeerConnectionDependencyFactory : public rtc::RefCountInterface {
   CreatePeerConnectionOnCurrentThread(
       const webrtc::PeerConnectionInterface::RTCConfiguration& config,
       webrtc::PeerConnectionObserver* observer);
-  void CreateNetworkMonitorOnCurrentThread();
 #if defined(WEBRTC_WIN) || defined(WEBRTC_LINUX)
   rtc::scoped_refptr<webrtc::AudioDeviceModule> CreateCustomizedAudioDeviceModuleOnCurrentThread();
 #endif
@@ -91,9 +89,6 @@ class PeerConnectionDependencyFactory : public rtc::RefCountInterface {
                                                // VP8, H.264 & HEVC enc/dec
 #endif
   bool encoded_frame_;
-#if defined(WEBRTC_IOS)
-  rtc::NetworkMonitorInterface* network_monitor_;
-#endif
   std::string field_trial_;
 #if defined(WEBRTC_WIN)
   std::unique_ptr<webrtc::ScopedCOMInitializer> com_initializer_;