Make PeerConnection constructor with WebIDL errors

According to https://w3c.github.io/webrtc-pc/#constructor defined.
there are WebIDL errors should be returned when constructor failed.

api.go

@@ -6,7 +6,7 @@ import (
 	"github.com/pion/logging"
 )
 
-// API bundles the global funcions of the WebRTC and ORTC API.
+// API bundles the global functions of the WebRTC and ORTC API.
 // Some of these functions are also exported globally using the
 // defaultAPI object. Note that the global version of the API
 // may be phased out in the future.

icecredentialtype.go

@@ -5,7 +5,7 @@ package webrtc
 type ICECredentialType int
 
 const (
-	// ICECredentialTypePassword describes username and pasword based
+	// ICECredentialTypePassword describes username and password based
 	// credentials as described in https://tools.ietf.org/html/rfc5389.
 	ICECredentialTypePassword ICECredentialType = iota
 

iceserver.go

@@ -31,7 +31,7 @@ func (s ICEServer) urls() ([]*ice.URL, error) {
 	for i := range s.URLs {
 		url, err := s.parseURL(i)
 		if err != nil {
-			return nil, err
+			return nil, &rtcerr.InvalidAccessError{Err: err}
 		}
 
 		if url.Scheme == ice.SchemeTypeTURN || url.Scheme == ice.SchemeTypeTURNS {

iceserver_test.go

@@ -69,7 +69,7 @@ func TestICEServer_validate(t *testing.T) {
 				Username:       "unittest",
 				Credential:     false,
 				CredentialType: ICECredentialTypeOauth,
-			}, ice.ErrSTUNQuery},
+			}, &rtcerr.InvalidAccessError{Err: ice.ErrSTUNQuery}},
 		}
 
 		for i, testCase := range testCases {