Stop using VoEVideoSync in Call/VideoReceiveStream.

webrtc/call/syncable.h

Index: webrtc/call/syncable.h
diff --git a/webrtc/call/syncable.h b/webrtc/call/syncable.h
new file mode 100644
index 0000000000000000000000000000000000000000..8e1cb95c2997f3706e65cc1654535d266aaab41e
--- /dev/null
+++ b/webrtc/call/syncable.h
@@ -0,0 +1,43 @@
+/*
+ *  Copyright (c) 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.
+ */
+
+// Syncable is used by RtpStreamsSynchronizer in VideoReceiveStream, and
+// implemented by AudioReceiveStream.
+
+#ifndef WEBRTC_CALL_SYNCABLE_H_
+#define WEBRTC_CALL_SYNCABLE_H_
+
+#include <stdint.h>
+
+#include "webrtc/base/optional.h"
+
+namespace webrtc {
+
+class Syncable {
+ public:
+  struct Info {
+    int64_t latest_receive_time_ms = 0;
+    uint32_t latest_receive_timestamp = 0;
+    uint32_t ntp_secs = 0;
+    uint32_t ntp_frac = 0;
+    uint32_t rtp_timestamp = 0;
+    int current_delay_ms = 0;
+  };
+
+  virtual ~Syncable();
+
+  virtual int id() const = 0;
+  virtual rtc::Optional<Info> GetInfo() const = 0;
+  virtual uint32_t GetPlayoutTimestamp() const = 0;
+  virtual void SetMinimumPlayoutDelay(int delay_ms) = 0;
+};
+}  // namespace webrtc
+
+#endif  // WEBRTC_CALL_SYNCABLE_H_