Revert of Relanding: Implement RTCConfiguration.iceCandidatePoolSize.

webrtc/api/webrtcsession.cc

Index: webrtc/api/webrtcsession.cc
diff --git a/webrtc/api/webrtcsession.cc b/webrtc/api/webrtcsession.cc
index dabfefa582d439ad70d5b354fe99d00df01893eb..9f84840822fce12c4c9012b568e10c0b3b4e651b 100644
--- a/webrtc/api/webrtcsession.cc
+++ b/webrtc/api/webrtcsession.cc
@@ -421,6 +421,22 @@
   return MakeErrorString(kPushDownTDFailed, desc);
 }
 
+uint32_t ConvertIceTransportTypeToCandidateFilter(
+    PeerConnectionInterface::IceTransportsType type) {
+  switch (type) {
+    case PeerConnectionInterface::kNone:
+        return cricket::CF_NONE;
+    case PeerConnectionInterface::kRelay:
+        return cricket::CF_RELAY;
+    case PeerConnectionInterface::kNoHost:
+        return (cricket::CF_ALL & ~cricket::CF_HOST);
+    case PeerConnectionInterface::kAll:
+        return cricket::CF_ALL;
+    default: ASSERT(false);
+  }
+  return cricket::CF_NONE;
+}
+
 // Returns true if |new_desc| requests an ICE restart (i.e., new ufrag/pwd).
 bool CheckForRemoteIceRestart(const SessionDescriptionInterface* old_desc,
                               const SessionDescriptionInterface* new_desc,
@@ -459,6 +475,7 @@
                              cricket::PortAllocator* port_allocator)
     : signaling_thread_(signaling_thread),
       worker_thread_(worker_thread),
+      port_allocator_(port_allocator),
       // RFC 3264: The numeric value of the session id and version in the
       // o line MUST be representable with a "64 bit signed integer".
       // Due to this constraint session id |sid_| is max limited to LLONG_MAX.
@@ -587,6 +604,8 @@
   if (options.disable_encryption) {
     webrtc_session_desc_factory_->SetSdesPolicy(cricket::SEC_DISABLED);
   }
+  port_allocator()->set_candidate_filter(
+      ConvertIceTransportTypeToCandidateFilter(rtc_configuration.type));
 
   return true;
 }
@@ -1124,6 +1143,12 @@
     LOG(LS_ERROR) << "Error when removing remote candidates: " << error;
   }
   return true;
+}
+
+bool WebRtcSession::SetIceTransports(
+    PeerConnectionInterface::IceTransportsType type) {
+  return port_allocator()->set_candidate_filter(
+        ConvertIceTransportTypeToCandidateFilter(type));
 }
 
 cricket::IceConfig WebRtcSession::ParseIceConfig(