RTCCertificate.getFingerprints added (exposed to the web)

chrome/test/data/webrtc/peerconnection.js

Index: chrome/test/data/webrtc/peerconnection.js
diff --git a/chrome/test/data/webrtc/peerconnection.js b/chrome/test/data/webrtc/peerconnection.js
index d236dc51303ae40b6170ca66954d0e2ebea9c268..22963b43f09fcf0a8b429b9be8a976bd40c1152b 100644
--- a/chrome/test/data/webrtc/peerconnection.js
+++ b/chrome/test/data/webrtc/peerconnection.js
@@ -245,6 +245,30 @@ function verifyDefaultCodecs(sessionDescJson) {
   returnToTest('ok-verified');
 }
 
+/**
+ * Verifies that the peer connection's local description contains one of
+ * |certificate|'s fingerprints.
+ *
+ * Returns 'ok-verified' on success.
+ */
+function verifyLocalDescriptionContainsCertificate(certificate) {
+  let localDescription = peerConnection_().localDescription;
+  if (localDescription == null)
+    throw failTest('localDescription is null.');
+  for (let i = 0; i < certificate.getFingerprints().length; ++i) {
+    let fingerprintSdp = 'a=fingerprint:' +
+        certificate.getFingerprints()[i].algorithm + ' ' +
+        certificate.getFingerprints()[i].value.toUpperCase();
+    if (localDescription.sdp.includes(fingerprintSdp)) {
+      returnToTest('ok-verified');
+      return;
+    }
+  }
+  if (!localDescription.sdp.includes('a=fingerprint'))
+    throw failTest('localDescription does not contain any fingerprints.');
+  throw failTest('Certificate fingerprint not found in localDescription.');
+}
+
 /**
  * Asks this page to accept an answer generated by the peer in response to a
  * previous offer by this page