Add support for capturers to capture VideoFrames.

webrtc/sdk/android/src/java/org/webrtc/AndroidVideoTrackSourceObserver.java

 /*
  *  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.
  */
 
@@ skipping 25 matching lines @@
         nativeSource, data, data.length, width, height, rotation, timeStamp);
   }
 
   @Override
   public void onTextureFrameCaptured(int width, int height, int oesTextureId,
       float[] transformMatrix, int rotation, long timestamp) {
     nativeOnTextureFrameCaptured(
         nativeSource, width, height, oesTextureId, transformMatrix, rotation, timestamp);
   }
 
+  @Override
+  public void onFrameCaptured(VideoFrame frame) {
+    nativeOnFrameCaptured(nativeSource, frame.getBuffer().getWidth(), frame.getBuffer().getHeight(),
+        frame.getRotation(), frame.getTimestampNs(), frame.getBuffer());
+  }
+
   private native void nativeCapturerStarted(long nativeSource, boolean success);
   private native void nativeCapturerStopped(long nativeSource);
   private native void nativeOnByteBufferFrameCaptured(long nativeSource, byte[] data, int length,
       int width, int height, int rotation, long timeStamp);
   private native void nativeOnTextureFrameCaptured(long nativeSource, int width, int height,
       int oesTextureId, float[] transformMatrix, int rotation, long timestamp);
+  private native void nativeOnFrameCaptured(long nativeSource, int width, int height, int rotation,
+      long timestampNs, VideoFrame.Buffer frame);
 }