Build WebRTC with data channel only.

webrtc/call/callfactoryinterface.h

+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_CALL_CALLFACTORYINTERFACE_H_
+#define WEBRTC_CALL_CALLFACTORYINTERFACE_H_
+
+#include <memory>
+
+#include "webrtc/call/call.h"
+
+namespace webrtc {
+

[Taylor Brandstetter, 2017/06/14 01:54:16]

This and event_log_factory_interface.h could use some comments explaining why
they exist. Also, shouldn't they go in the api/ directory?

[Zhi Huang, 2017/06/14 06:57:01]

Done.

I'm confused about where this interface should go because it seems that the STO
teams is working on moving the files from api/call/ to call/. Can we keep it
here for now and make it part of call_interface target?
https://codereview.webrtc.org/2550273003

[Taylor Brandstetter, 2017/06/15 00:35:02]

Don't worry about moving the files for now. I'll plan on fleshing out the
"slim/modular" plan and working out where files go while I'm in STO.

+class CallFactoryInterface {
+ public:
+  virtual ~CallFactoryInterface() {}
+
+  virtual Call* CreateCall(const Call::Config& config) = 0;
+};
+
+std::unique_ptr<CallFactoryInterface> CreateCallFactory();

[Taylor Brandstetter, 2017/06/14 01:54:16]

nit: newline before '}'

[Zhi Huang, 2017/06/14 06:57:01]

Done.

+}  // namespace webrtc
+
+#endif  // WEBRTC_CALL_CALLFACTORYINTERFACE_H_