Revert of Break peerconnection_jni.cc into multiple files, in "pc" directory.

webrtc/sdk/android/src/jni/video_jni.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_SDK_ANDROID_SRC_JNI_VIDEO_JNI_H_
+#define WEBRTC_SDK_ANDROID_SRC_JNI_VIDEO_JNI_H_
+
+#include <jni.h>
+
+#include "webrtc/rtc_base/scoped_ref_ptr.h"
+
+namespace cricket {
+class WebRtcVideoEncoderFactory;
+class WebRtcVideoDecoderFactory;
+}  // namespace cricket
+
+namespace webrtc_jni {
+
+class SurfaceTextureHelper;
+
+cricket::WebRtcVideoEncoderFactory* CreateVideoEncoderFactory(
+    JNIEnv* jni,
+    jobject j_encoder_factory);
+
+cricket::WebRtcVideoDecoderFactory* CreateVideoDecoderFactory(
+    JNIEnv* jni,
+    jobject j_decoder_factory);
+
+jobject GetJavaSurfaceTextureHelper(
+    const rtc::scoped_refptr<SurfaceTextureHelper>& surface_texture_helper);
+
+}  // namespace webrtc_jni
+
+#endif  // WEBRTC_SDK_ANDROID_SRC_JNI_VIDEO_JNI_H_