Add promise-based addIceCandidate, setLocalDescription and setRemoteDescription to RTCPeerConnection

third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription-promise.html

Index: third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription-promise.html
diff --git a/third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html b/third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription-promise.html
similarity index 61%
copy from third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
copy to third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription-promise.html
index a8987914665129244a44fbb560021f856629ebcc..b69ca0748f3a3368d93448621091e7cee68a557f 100644
--- a/third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription.html
+++ b/third_party/WebKit/LayoutTests/fast/mediastream/RTCPeerConnection-localDescription-promise.html
@@ -39,14 +39,28 @@ function requestSucceeded1()
     testPassed('requestSucceeded was called.');
 
     sessionDescription = new RTCSessionDescription({type:"answer", sdp:"remote"});
-    shouldNotThrow('pc.setLocalDescription(sessionDescription, requestSucceeded2, requestFailed2);');
+    shouldNotThrow('pc.setLocalDescription(sessionDescription).then(requestSucceeded2, requestFailed2);');
+}
+
+function expectedTypeError(error)
+{
+    errorReason = error;
+    shouldBe('errorReason.name', '"TypeError"')
+    testPassed('expectedTypeError was called.')
+}
+
+function expectedInvalidSessionDescription(error)
+{
+    errorReason = error;
+    shouldBe('errorReason.name', '"InvalidSessionDescription"')
+    testPassed('expectedInvalidSessionDescription was called.')
 }
 
 pc = new webkitRTCPeerConnection(null, null);
-shouldThrow('pc.setLocalDescription(null)');
+shouldNotThrow('pc.setLocalDescription().catch(expectedTypeError)');
+shouldNotThrow('pc.setLocalDescription(null).catch(expectedInvalidSessionDescription)');
 var sessionDescription = new RTCSessionDescription({type:"offer", sdp:"local"});
-shouldNotThrow('pc.setLocalDescription(sessionDescription, requestSucceeded1, requestFailed1);');
-
+shouldNotThrow('pc.setLocalDescription(sessionDescription).then(requestSucceeded1, requestFailed1);');
 
 window.jsTestIsAsync = true;
 window.successfullyParsed = true;