Add "ice-option:trickle" to generated offers/answers.

webrtc/p2p/base/transportdescriptionfactory_unittest.cc

 /*
  *  Copyright 2012 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.
  */
 
@@ skipping 109 matching lines @@
     std::unique_ptr<TransportDescription> renomination_answer(f2_.CreateAnswer(
         renomination_offer.get(), options, true, answer.get()));
     VerifyRenomination(renomination_answer.get(), true);
   }
 
  protected:
   void VerifyRenomination(TransportDescription* desc,
                           bool renomination_expected) {
     ASSERT_TRUE(desc != nullptr);
     std::vector<std::string>& options = desc->transport_options;
-    auto iter = std::find(options.begin(), options.end(),
-                          cricket::ICE_RENOMINATION_STR);
+    auto iter = std::find(options.begin(), options.end(), "renomination");
     EXPECT_EQ(renomination_expected, iter != options.end());
   }
 
   void SetDtls(bool dtls) {
     if (dtls) {
       f1_.set_secure(cricket::SEC_ENABLED);
       f2_.set_secure(cricket::SEC_ENABLED);
       f1_.set_certificate(cert1_);
       f2_.set_certificate(cert2_);
     } else {
@@ skipping 151 matching lines @@
 TEST_F(TransportDescriptionFactoryTest, TestIceRenomination) {
   TestIceRenomination(false);
 }
 
 // Test that ice renomination is set in an updated offer and answer
 // if |TransportDescriptionOptions::enable_ice_renomination| is true and DTLS
 // is enabled.
 TEST_F(TransportDescriptionFactoryTest, TestIceRenominationWithDtls) {
   TestIceRenomination(true);
 }
+
+// Test that offers and answers have ice-option:trickle.
+TEST_F(TransportDescriptionFactoryTest, AddsTrickleIceOption) {
+  cricket::TransportOptions options;
+  std::unique_ptr<TransportDescription> offer(
+      f1_.CreateOffer(options, nullptr));
+  EXPECT_TRUE(offer->HasOption("trickle"));
+  std::unique_ptr<TransportDescription> answer(
+      f2_.CreateAnswer(offer.get(), options, true, nullptr));
+  EXPECT_TRUE(answer->HasOption("trickle"));
+}