binding: Makes Dictionary::hasProperty rethrow an exception.

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 832 matching lines @@
     ScriptPromise promise = result->promise();
     result->completeWithError(error.errorType, error.errorDetails);
     return promise;
   }
 
   // Check if |keygenAlgorithm| contains the optional DOMTimeStamp |expires|
   // attribute.
   Nullable<DOMTimeStamp> expires;
   if (keygenAlgorithm.isDictionary()) {
     Dictionary keygenAlgorithmDict = keygenAlgorithm.getAsDictionary();
-    if (keygenAlgorithmDict.hasProperty("expires")) {
+    if (keygenAlgorithmDict.hasProperty("expires", exceptionState)) {
       v8::Local<v8::Value> expiresValue;
       keygenAlgorithmDict.get("expires", expiresValue);
       if (expiresValue->IsNumber()) {
         double expiresDouble =
             expiresValue->ToNumber(scriptState->isolate()->GetCurrentContext())
                 .ToLocalChecked()
                 ->Value();
         if (expiresDouble >= 0) {
           expires.set(static_cast<DOMTimeStamp>(expiresDouble));
         }
       }
     }
   }
+  if (exceptionState.hadException()) {
+    return ScriptPromise();
+  }
 
   // Convert from WebCrypto representation to recognized WebRTCKeyParams. WebRTC
   // supports a small subset of what are valid AlgorithmIdentifiers.
   const char* unsupportedParamsString =
       "The 1st argument provided is an AlgorithmIdentifier with a supported "
       "algorithm name, but the parameters are not supported.";
   Nullable<WebRTCKeyParams> keyParams;
   switch (cryptoAlgorithm.id()) {
     case WebCryptoAlgorithmIdRsaSsaPkcs1v1_5:
       // name: "RSASSA-PKCS1-v1_5"
@@ skipping 604 matching lines @@
 DEFINE_TRACE(RTCPeerConnection) {
   visitor->trace(m_localStreams);
   visitor->trace(m_remoteStreams);
   visitor->trace(m_dispatchScheduledEventRunner);
   visitor->trace(m_scheduledEvents);
   EventTargetWithInlineData::trace(visitor);
   ActiveDOMObject::trace(visitor);
 }
 
 }  // namespace blink