Reland of landing: Implement RTCConfiguration.iceCandidatePoolSize.

webrtc/p2p/base/port.cc

Index: webrtc/p2p/base/port.cc
diff --git a/webrtc/p2p/base/port.cc b/webrtc/p2p/base/port.cc
index a353dc2a2f0a75975af37fd2b1d5a2d3ae6cd93f..fbc64f2e0a784175a2f1f94ae25bac4aca3b710a 100644
--- a/webrtc/p2p/base/port.cc
+++ b/webrtc/p2p/base/port.cc
@@ -217,6 +217,19 @@
 
   for (uint32_t i = 0; i < list.size(); i++)
     delete list[i];
+}
+
+void Port::SetIceParameters(int component,
+                            const std::string& username_fragment,
+                            const std::string& password) {
+  component_ = component;
+  ice_username_fragment_ = username_fragment;
+  password_ = password;
+  for (Candidate& c : candidates_) {
+    c.set_component(component);
+    c.set_username(username_fragment);
+    c.set_password(password);
+  }
 }
 
 Connection* Port::GetConnection(const rtc::SocketAddress& remote_addr) {