Add promise-based addIceCandidate, setLocalDescription and setRemoteDescription to RTCPeerConnection

third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef RTCVoidRequestPromiseImpl_h
+#define RTCVoidRequestPromiseImpl_h
+
+#include "core/dom/ActiveDOMObject.h"
+#include "platform/heap/Handle.h"
+#include "platform/mediastream/RTCVoidRequest.h"
+
+namespace blink {
+
+class ScriptPromiseResolver;
+class RTCPeerConnection;
+
+class RTCVoidRequestPromiseImpl final : public RTCVoidRequest, public ActiveDOMObject {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RTCVoidRequestPromiseImpl);

[philipj_slow, 2016/02/09 12:02:04]

Looks like this class will only work with Oilpan, so skip the transitional
macro?

[Guido Urdaneta, 2016/02/09 16:51:01]

Done.

+public:
+    static RTCVoidRequestPromiseImpl* create(RTCPeerConnection*, ScriptPromiseResolver*, const String& errorName);
+    ~RTCVoidRequestPromiseImpl() override;
+
+    // RTCVoidRequest
+    void requestSucceeded() override;
+    void requestFailed(const String& error) override;

[philipj_slow, 2016/02/09 12:02:04]

This seems a bit strange, shouldn't the type of error also be in this callback
and not in the constructor? How can the constructor know in which way it will
fail?

[Guido Urdaneta, 2016/02/09 16:51:01]

Already explained by hta.

+
+    // ActiveDOMObject

[philipj_slow, 2016/02/09 12:02:04]

What happens if this is not an ActiveDOMObject and is there test case coverage
for that?

[Guido Urdaneta, 2016/02/09 16:51:01]

I removed the inheritance from ActiveDOMObject and instead am checking that
ActiveDOMObjects are not stopped in the resolver's execution context when the
promise is about to be accepted or rejected.

[philipj_slow, 2016/02/09 18:59:17]

Makes sense!

+    void stop() override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    RTCVoidRequestPromiseImpl(RTCPeerConnection*, ScriptPromiseResolver*, const String& errorName);
+
+    void clear();
+
+    Member<ScriptPromiseResolver> m_resolver;
+    String m_errorName;
+    Member<RTCPeerConnection> m_requester;
+};
+
+} // namespace blink
+
+#endif // RTCVoidRequestPromiseImpl_h