Revert "Reland "Pass NetworkMonitorFactory through PeerConnectionFactory.""

This reverts commit 7ded73351870bfb45160fa6b9db71a94fe49397b.

Reason for revert: Found more code calling NetworkMonitorFactory::SetFactory...

Original change's description:
> Reland "Pass NetworkMonitorFactory through PeerConnectionFactory."
> 
> This is a reland of 003c9be817817ed0e3aef3f50c78ae5cb31bc0ff
> 
> Original change's description:
> > Pass NetworkMonitorFactory through PeerConnectionFactory.
> >
> > Previously the instance was set through a static method, which was
> > really only done because it was difficult to add new
> > PeerConnectionFactory construction arguments at the time.
> >
> > Now that we have PeerConnectionFactoryDependencies it's easy to clean
> > this up.
> >
> > I'm doing this because I plan to add a NetworkMonitor implementation
> > for iOS, and don't want to inherit this ugliness.
> >
> > Bug: webrtc:9883
> > Change-Id: Id94dc061ab1c7186b81af8547393a6e336ff04c2
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/180241
> > 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@{#31815}
> 
> TBR=hta@webrtc.org, sakal@webrtc.org
> 
> Bug: webrtc:9883
> Change-Id: Ibf69a22e8f94226908636c7d50ff9eda65bd4129
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/180720
> Reviewed-by: Taylor <deadbeef@webrtc.org>
> Commit-Queue: Taylor <deadbeef@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#31822}

TBR=deadbeef@webrtc.org,sakal@webrtc.org,hta@webrtc.org

Change-Id: Iae51b94072cec9abc021eed4e51d1fbeee998adc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:9883
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/180721
Reviewed-by: Taylor <deadbeef@webrtc.org>
Commit-Queue: Taylor <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31823}
diff --git a/api/DEPS b/api/DEPS
index 4b93438..4fc132b 100644
--- a/api/DEPS
+++ b/api/DEPS
@@ -128,7 +128,7 @@
     "+media/base/media_config.h",
     "+media/base/media_engine.h",
     "+p2p/base/port_allocator.h",
-    "+rtc_base/network_monitor_factory.h",
+    "+rtc_base/network.h",
     "+rtc_base/rtc_certificate.h",
     "+rtc_base/rtc_certificate_generator.h",
     "+rtc_base/socket_address.h",
diff --git a/api/peer_connection_interface.h b/api/peer_connection_interface.h
index b1beb84..52d0d87 100644
--- a/api/peer_connection_interface.h
+++ b/api/peer_connection_interface.h
@@ -113,7 +113,7 @@
 // inject a PacketSocketFactory and/or NetworkManager, and not expose
 // PortAllocator in the PeerConnection api.
 #include "p2p/base/port_allocator.h"  // nogncheck
-#include "rtc_base/network_monitor_factory.h"
+#include "rtc_base/network.h"
 #include "rtc_base/rtc_certificate.h"
 #include "rtc_base/rtc_certificate_generator.h"
 #include "rtc_base/socket_address.h"
@@ -1326,10 +1326,6 @@
   std::unique_ptr<NetworkStatePredictorFactoryInterface>
       network_state_predictor_factory;
   std::unique_ptr<NetworkControllerFactoryInterface> network_controller_factory;
-  // This will only be used if CreatePeerConnection is called without a
-  // |port_allocator|, causing the default allocator and network manager to be
-  // used.
-  std::unique_ptr<rtc::NetworkMonitorFactory> network_monitor_factory;
   std::unique_ptr<NetEqFactory> neteq_factory;
   std::unique_ptr<WebRtcKeyValueConfig> trials;
 };