Make sure WebRTC works without libvpx VP9 support.

webrtc/modules/video_coding/codecs/vp9/vp9_noop.cc

 /*
  *  Copyright (c) 2016 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.
+ *
  */
-#include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
+
+#if !defined(RTC_DISABLE_VP9)
+#error
+#endif  // !defined(RTC_DISABLE_VP9)
+
+#include "webrtc/base/checks.h"
+#include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
 
 namespace webrtc {
 
-void FuzzOneInput(const uint8_t* data, size_t size) {
-  RtpPacketReceived packet;
+bool VP9Encoder::IsSupported() {
+  return false;
+}
 
-  packet.Parse(data, size);
+VP9Encoder* VP9Encoder::Create() {
+  RTC_NOTREACHED();
+  return nullptr;
+}
 
-  // Call packet accessors because they have extra checks.
-  packet.Marker();
-  packet.PayloadType();
-  packet.SequenceNumber();
-  packet.Timestamp();
-  packet.Ssrc();
-  packet.Csrcs();
+bool VP9Decoder::IsSupported() {
+  return false;
+}
+
+VP9Decoder* VP9Decoder::Create() {
+  RTC_NOTREACHED();
+  return nullptr;
 }
 
 }  // namespace webrtc
-