Change PeerConnectionFactory.setVideoHwAccelerationOptions to be able to replace Egl context.

webrtc/api/java/jni/androidmediaencoder_jni.cc

 /*
  *  Copyright 2015 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 1195 matching lines @@
   ALOGD << "MediaCodecVideoEncoderFactory dtor";
   if (egl_context_) {
     JNIEnv* jni = AttachCurrentThreadIfNeeded();
     jni->DeleteGlobalRef(egl_context_);
   }
 }
 
 void MediaCodecVideoEncoderFactory::SetEGLContext(
     JNIEnv* jni, jobject egl_context) {
   ALOGD << "MediaCodecVideoEncoderFactory::SetEGLContext";
-  RTC_DCHECK(!egl_context_);
+  if (egl_context_) {
+    jni->DeleteGlobalRef(egl_context_);
+    egl_context_ = nullptr;
+  }
   egl_context_ = jni->NewGlobalRef(egl_context);
   if (CheckException(jni)) {
     ALOGE << "error calling NewGlobalRef for EGL Context.";
   }
 }
 
 webrtc::VideoEncoder* MediaCodecVideoEncoderFactory::CreateVideoEncoder(
     VideoCodecType type) {
   if (supported_codecs_.empty()) {
     ALOGW << "No HW video encoder for type " << (int)type;
@@ skipping 18 matching lines @@
 }
 
 void MediaCodecVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   ALOGD << "Destroy video encoder.";
   delete encoder;
 }
 
 }  // namespace webrtc_jni