Create the API that returns the RTCConfiguration of the PeerConnection.

third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp

Index: third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp
diff --git a/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp b/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp
index df9d88ec758b195311ddb78892e82de4f0d8d9d7..2ff2b9adae8d819db82eb01a0f5598e18d949996 100644
--- a/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp
+++ b/third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.cpp
@@ -296,6 +296,7 @@ WebRTCConfiguration parseConfiguration(ExecutionContext* context,
       String username = iceServer.username();
       String credential = iceServer.credential();
 
+      Vector<WebURL> urls;
       for (const String& urlString : urlStrings) {
         KURL url(KURL(), urlString);
         if (!url.isValid()) {
@@ -318,8 +319,9 @@ WebRTCConfiguration parseConfiguration(ExecutionContext* context,
                                            "required when the URL scheme is "
                                            "\"turn\" or \"turns\".");
         }
-        iceServers.push_back(WebRTCIceServer{url, username, credential});
+        urls.push_back(url);
       }
+      iceServers.push_back(WebRTCIceServer{urls, username, credential});
     }
     webConfiguration.iceServers = iceServers;
   }
@@ -338,6 +340,77 @@ WebRTCConfiguration parseConfiguration(ExecutionContext* context,
   return webConfiguration;
 }
 
+RTCConfiguration getWebKitRtcConfiguration(WebRTCConfiguration& blinkConfig) {
+  RTCConfiguration rtcConfig;
+
+  switch (blinkConfig.iceTransportPolicy) {
+    case blink::WebRTCIceTransportPolicy::kNone:
+      rtcConfig.setIceTransportPolicy("none");
+      break;
+    case blink::WebRTCIceTransportPolicy::kRelay:
+      rtcConfig.setIceTransportPolicy("relay");
+      break;
+    case blink::WebRTCIceTransportPolicy::kAll:
+      rtcConfig.setIceTransportPolicy("all");
+      break;
+    default:

[Taylor_Brandstetter, 2017/03/02 22:30:45]

nit: Don't need any of the default cases in this function.

+      NOTREACHED();
+  }
+
+  switch (blinkConfig.bundlePolicy) {
+    case blink::WebRTCBundlePolicy::kBalanced:
+      rtcConfig.setBundlePolicy("balanced");
+      break;
+    case blink::WebRTCBundlePolicy::kMaxBundle:
+      rtcConfig.setBundlePolicy("max-bundle");
+      break;
+    case blink::WebRTCBundlePolicy::kMaxCompat:
+      rtcConfig.setBundlePolicy("max-compat");
+      break;
+    default:
+      NOTREACHED();
+  }
+
+  switch (blinkConfig.rtcpMuxPolicy) {
+    case blink::WebRTCRtcpMuxPolicy::kNegotiate:
+      rtcConfig.setRtcpMuxPolicy("negotiate");
+      break;
+    case blink::WebRTCRtcpMuxPolicy::kRequire:
+      rtcConfig.setRtcpMuxPolicy("require");
+      break;
+    default:
+      NOTREACHED();
+  }
+
+  HeapVector<RTCIceServer> servers;
+  for (WebRTCIceServer blink_server : blinkConfig.iceServers) {
+    RTCIceServer server;
+    Vector<String> urlStrings;
+    StringOrStringSequence urls;
+    for (WebURL blink_url : blink_server.urls) {
+      String urlString(blink_url.string().utf8().c_str());
+      urlStrings.push_back(urlString);
+    }
+    urls.setStringSequence(urlStrings);
+    server.setURLs(urls);
+    String username(blink_server.username.utf8().c_str());
+    server.setUsername(blink_server.username);
+    String credential(blink_server.credential.utf8().c_str());
+    server.setCredential(credential);
+    servers.push_back(server);
+  }
+  rtcConfig.setIceServers(servers);
+
+  HeapVector<Member<RTCCertificate>> certificates;
+  for (std::unique_ptr<blink::WebRTCCertificate>& blink_certificate :
+       blinkConfig.certificates) {
+    certificates.push_back(new RTCCertificate(std::move(blink_certificate)));
+  }
+  rtcConfig.setCertificates(certificates);
+
+  return rtcConfig;
+}
+
 RTCOfferOptionsPlatform* parseOfferOptions(const Dictionary& options,
                                            ExceptionState& exceptionState) {
   if (options.isUndefinedOrNull())
@@ -793,6 +866,11 @@ RTCSessionDescription* RTCPeerConnection::remoteDescription() {
   return RTCSessionDescription::create(webSessionDescription);
 }
 
+void RTCPeerConnection::getConfiguration(RTCConfiguration& rtcConfig) {
+  blink::WebRTCConfiguration blinkConfig = m_peerHandler->getConfiguration();
+  rtcConfig = getWebKitRtcConfiguration(blinkConfig);
+}
+
 void RTCPeerConnection::setConfiguration(
     ScriptState* scriptState,
     const RTCConfiguration& rtcConfiguration,