RTCCertificate.getFingerprints added (exposed to the web)

content/renderer/media/rtc_certificate.cc

Index: content/renderer/media/rtc_certificate.cc
diff --git a/content/renderer/media/rtc_certificate.cc b/content/renderer/media/rtc_certificate.cc
index 40d00ede555ac9714cf6aae739006aa91e544750..de998bf22e94d032fa378ccb9192273fed307333 100644
--- a/content/renderer/media/rtc_certificate.cc
+++ b/content/renderer/media/rtc_certificate.cc
@@ -4,7 +4,11 @@
 
 #include "content/renderer/media/rtc_certificate.h"
 
+#include <vector>
+
 #include "base/memory/ptr_util.h"
+#include "base/strings/string_util.h"
+#include "third_party/webrtc/base/sslidentity.h"
 #include "url/gurl.h"
 
 namespace content {
@@ -26,6 +30,22 @@ uint64_t RTCCertificate::Expires() const {
   return certificate_->Expires();
 }
 
+blink::WebVector<blink::WebRTCDtlsFingerprint> RTCCertificate::GetFingerprints()
+    const {
+  std::vector<blink::WebRTCDtlsFingerprint> fingerprints;
+  std::unique_ptr<rtc::SSLCertificateStats> first_certificate_stats =
+      certificate_->identity()->certificate().GetStats();
+  for (rtc::SSLCertificateStats* certificate_stats =
+           first_certificate_stats.get();
+       certificate_stats; certificate_stats = certificate_stats->issuer.get()) {
+    fingerprints.push_back(blink::WebRTCDtlsFingerprint(
+        blink::WebString::FromUTF8(certificate_stats->fingerprint_algorithm),
+        blink::WebString::FromUTF8(
+            base::ToLowerASCII(certificate_stats->fingerprint))));
+  }
+  return blink::WebVector<blink::WebRTCDtlsFingerprint>(fingerprints);
+}
+
 blink::WebRTCCertificatePEM RTCCertificate::ToPEM() const {
   rtc::RTCCertificatePEM pem = certificate_->ToPEM();
   return blink::WebRTCCertificatePEM(