Reland of landing: Implement RTCConfiguration.iceCandidatePoolSize.

webrtc/api/peerconnectionfactory.cc

Index: webrtc/api/peerconnectionfactory.cc
diff --git a/webrtc/api/peerconnectionfactory.cc b/webrtc/api/peerconnectionfactory.cc
index b2a379839c06a40ed13cfad151896254820b2220..71748e8e850e411fe1ef306fbd3ea065798820fa 100644
--- a/webrtc/api/peerconnectionfactory.cc
+++ b/webrtc/api/peerconnectionfactory.cc
@@ -282,7 +282,9 @@
     allocator.reset(new cricket::BasicPortAllocator(
         default_network_manager_.get(), default_socket_factory_.get()));
   }
-  allocator->SetNetworkIgnoreMask(options_.network_ignore_mask);
+  worker_thread_->Invoke<void>(
+      rtc::Bind(&cricket::PortAllocator::SetNetworkIgnoreMask, allocator.get(),
+                options_.network_ignore_mask));
 
   rtc::scoped_refptr<PeerConnection> pc(
       new rtc::RefCountedObject<PeerConnection>(this));