[Presentation API] Resolve PresentationRequest::reconnect() with existing presentation connection i…

third_party/WebKit/Source/modules/presentation/PresentationController.cpp

Index: third_party/WebKit/Source/modules/presentation/PresentationController.cpp
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationController.cpp b/third_party/WebKit/Source/modules/presentation/PresentationController.cpp
index 65d4edecad0fbfcede0a233126b2afe3d2d6efb7..d7687dbe4e2a64d5ca13493894240bcca894f2c9 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationController.cpp
+++ b/third_party/WebKit/Source/modules/presentation/PresentationController.cpp
@@ -148,6 +148,20 @@ void PresentationController::contextDestroyed() {
   }
 }
 
+PresentationConnection* PresentationController::findExistingConnection(
+    const blink::WebVector<blink::WebURL>& presentationUrls,
+    const blink::WebString& presentationId) {
+  for (const auto& connection : m_connections) {
+    for (const auto& presentationUrl : presentationUrls) {
+      if (connection->getState() !=
+              WebPresentationConnectionState::Terminated &&
+          connection->matches(presentationId, presentationUrl))
+        return connection.get();
+    }
+  }
+  return nullptr;
+}
+
 PresentationConnection* PresentationController::findConnection(
     WebPresentationConnectionClient* connectionClient) {
   for (const auto& connection : m_connections) {