Relanding: Implement RTCConfiguration.iceCandidatePoolSize.

webrtc/p2p/base/port_unittest.cc

Index: webrtc/p2p/base/port_unittest.cc
diff --git a/webrtc/p2p/base/port_unittest.cc b/webrtc/p2p/base/port_unittest.cc
index 7e787e08eb316c24053efdcf6dc39a21891db446..1eeae282b9ca1de05ff0927eac85b7132dfc872f 100644
--- a/webrtc/p2p/base/port_unittest.cc
+++ b/webrtc/p2p/base/port_unittest.cc
@@ -2586,3 +2586,20 @@ TEST_F(PortTest, TestSupportsProtocol) {
   EXPECT_TRUE(turn_port->SupportsProtocol(UDP_PROTOCOL_NAME));
   EXPECT_FALSE(turn_port->SupportsProtocol(TCP_PROTOCOL_NAME));
 }
+
+// Test that SetTranpsortInformation updates the component, ufrag and password
+// on both the port itself and its candidates.
+TEST_F(PortTest, TestSetTransportInformation) {
+  std::unique_ptr<TestPort> port(
+      CreateTestPort(kLocalAddr1, "ufrag1", "password1"));
+  port->PrepareAddress();
+  EXPECT_EQ(1UL, port->Candidates().size());
+  port->SetTransportInformation(1, "ufrag2", "password2");
+  EXPECT_EQ(1, port->component());
+  EXPECT_EQ("ufrag2", port->username_fragment());
+  EXPECT_EQ("password2", port->password());
+  const Candidate& candidate = port->Candidates()[0];
+  EXPECT_EQ(1, candidate.component());
+  EXPECT_EQ("ufrag2", candidate.username());
+  EXPECT_EQ("password2", candidate.password());
+}