Report errors in RTCPeerConnection legacy functions via the the failure callback instead of excepti…

third_party/WebKit/Source/modules/mediastream/RTCPeerConnection.idl

 /*
  * 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 80 matching lines @@
     [RaisesException] void close();
     attribute EventHandler onnegotiationneeded;
     attribute EventHandler onicecandidate;
     attribute EventHandler onsignalingstatechange;
     attribute EventHandler oniceconnectionstatechange;
     // attribute EventHandler onicegatheringstatechange;
 
     // https://w3c.github.io/webrtc-pc/#legacy-interface-extensions
     // These methods return or will be changed to return Promise<void> because
     // having Promise-based versions requires that all overloads return Promises.
-    [CallWith=ExecutionContext, RaisesException] void createOffer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary rtcOfferOptions);
+    [CallWith=ExecutionContext] void createOffer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary rtcOfferOptions);
     // TODO(guidou): There should be no mediaConstraints argument.
-    [CallWith=ExecutionContext, RaisesException] void createAnswer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary mediaConstraints);
+    [CallWith=ExecutionContext] void createAnswer(RTCSessionDescriptionCallback successCallback, RTCPeerConnectionErrorCallback failureCallback, optional Dictionary mediaConstraints);
     [CallWith=ScriptState] Promise<void> setLocalDescription(RTCSessionDescription description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
     // TODO(guidou): The failureCallback argument should be non-optional.
     [CallWith=ScriptState] Promise<void> setRemoteDescription(RTCSessionDescription description, VoidCallback successCallback, [Default=Undefined] optional RTCPeerConnectionErrorCallback failureCallback);
     [CallWith=ScriptState] Promise<void> addIceCandidate(RTCIceCandidate candidate, VoidCallback successCallback, RTCPeerConnectionErrorCallback failureCallback);
     // TODO(guidou): The selector argument should the first (nullable,
     // non-optional) argument, and there should be a third failureCallback
     // argument.
     [CallWith=ExecutionContext, LegacyInterfaceTypeChecking] void getStats(RTCStatsCallback successCallback, [Default=Undefined] optional MediaStreamTrack selector);
 
     // https://w3c.github.io/webrtc-pc/#peer-to-peer-data-api
@@ skipping 10 matching lines @@
     [CallWith=ExecutionContext, RaisesException] void addStream(MediaStream? stream, optional Dictionary mediaConstraints);
     [RaisesException] void removeStream(MediaStream? stream);
     [RaisesException] RTCDTMFSender createDTMFSender(MediaStreamTrack track);
     attribute EventHandler onaddstream;
     attribute EventHandler onremovestream;
 
     // Certificate management
     // http://w3c.github.io/webrtc-pc/#sec.cert-mgmt
     [RaisesException, CallWith=ScriptState] static Promise<RTCCertificate> generateCertificate(AlgorithmIdentifier keygenAlgorithm);
 };