Removing NetworkMonitorFactory static global.

It's now passed through CreatePeerConnectionFactory like all similar
injectable dependencies.

Also removing network_monitor.h from native_api/base, since clients
should all be moved to the new location now.

Bug: webrtc:9883
Change-Id: I3776262ce2a2a380d01c163f4d18a0dfad4b5b41
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/181401
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Taylor <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31931}

rtc_base/network.cc

@@ -845,15 +845,11 @@ void BasicNetworkManager::StopUpdating() {
 }
 
 void BasicNetworkManager::StartNetworkMonitor() {
-  NetworkMonitorFactory* factory = network_monitor_factory_;
-  if (factory == nullptr) {
-    factory = NetworkMonitorFactory::GetFactory();
-    if (factory == nullptr) {
+  if (network_monitor_factory_ == nullptr) {
     return;
   }
-  }
   if (!network_monitor_) {
-    network_monitor_.reset(factory->CreateNetworkMonitor());
+    network_monitor_.reset(network_monitor_factory_->CreateNetworkMonitor());
     if (!network_monitor_) {
       return;
     }

rtc_base/network_monitor.h

@@ -12,9 +12,6 @@
 #define RTC_BASE_NETWORK_MONITOR_H_
 
 #include "rtc_base/network_constants.h"
-// TODO(deadbeef): Remove this include when downstream code stops using
-// NetworkMonitorFactory::SetFactory.
-#include "rtc_base/network_monitor_factory.h"
 #include "rtc_base/third_party/sigslot/sigslot.h"
 #include "rtc_base/thread.h"
 
@@ -64,8 +61,7 @@ class NetworkBinderInterface {
  *
  * Memory consideration:
  * NetworkMonitor is owned by the caller (NetworkManager). The global network
- * monitor factory is owned by the factory itself but needs to be released from
- * the factory creator.
+ * monitor factory is owned by the PeerConnectionFactory.
  */
 // Generic network monitor interface. It starts and stops monitoring network
 // changes, and fires the SignalNetworksChanged event when networks change.

rtc_base/network_monitor_factory.cc

@@ -10,33 +10,9 @@
 
 #include "rtc_base/network_monitor_factory.h"
 
-namespace {
-// This is set by NetworkMonitorFactory::SetFactory and the caller of
-// NetworkMonitorFactory::SetFactory must be responsible for calling
-// ReleaseFactory to destroy the factory.
-rtc::NetworkMonitorFactory* network_monitor_factory = nullptr;
-}  // namespace
-
 namespace rtc {
 
 NetworkMonitorFactory::NetworkMonitorFactory() {}
 NetworkMonitorFactory::~NetworkMonitorFactory() {}
 
-void NetworkMonitorFactory::SetFactory(NetworkMonitorFactory* factory) {
-  if (network_monitor_factory != nullptr) {
-    delete network_monitor_factory;
-  }
-  network_monitor_factory = factory;
-}
-
-void NetworkMonitorFactory::ReleaseFactory(NetworkMonitorFactory* factory) {
-  if (factory == network_monitor_factory) {
-    SetFactory(nullptr);
-  }
-}
-
-NetworkMonitorFactory* NetworkMonitorFactory::GetFactory() {
-  return network_monitor_factory;
-}
-
 }  // namespace rtc

rtc_base/network_monitor_factory.h

@@ -24,15 +24,6 @@ class NetworkMonitorInterface;
  */
 class NetworkMonitorFactory {
  public:
-  // This is not thread-safe; it should be called once (or once per audio/video
-  // call) during the call initialization.
-  // DEPRECATED: Should pass NetworkMonitorFactory through
-  // PeerConnectionFactoryDependencies instead.
-  static void SetFactory(NetworkMonitorFactory* factory);
-
-  static void ReleaseFactory(NetworkMonitorFactory* factory);
-  static NetworkMonitorFactory* GetFactory();
-
   virtual NetworkMonitorInterface* CreateNetworkMonitor() = 0;
 
   virtual ~NetworkMonitorFactory();

sdk/android/BUILD.gn

@@ -849,16 +849,11 @@ if (current_os == "linux" || is_android) {
     sources = [
       "native_api/base/init.cc",
       "native_api/base/init.h",
-      "native_api/base/network_monitor.h",
     ]
 
     deps = [
       ":base_jni",
       ":native_api_jni",
-
-      # TODO(deadbeef): Remove this once clients start depending on
-      # native_network_monitor directly.
-      ":native_api_network_monitor",
       "//rtc_base",
       "//rtc_base:checks",
     ]

sdk/android/native_api/base/network_monitor.h

@@ -1,18 +0,0 @@
-/*
- *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef SDK_ANDROID_NATIVE_API_BASE_NETWORK_MONITOR_H_
-#define SDK_ANDROID_NATIVE_API_BASE_NETWORK_MONITOR_H_
-
-// TODO(deadbeef): Remove this forwarding header once clients switch to the
-// new one.
-#include "sdk/android/native_api/network_monitor/network_monitor.h"
-
-#endif  // SDK_ANDROID_NATIVE_API_BASE_NETWORK_MONITOR_H_