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

webrtc/sdk/android/src/jni/media_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_MEDIA_JNI_H_
+#define WEBRTC_SDK_ANDROID_SRC_JNI_MEDIA_JNI_H_
+
+#include "webrtc/rtc_base/scoped_ref_ptr.h"
+
+namespace webrtc {
+class AudioDeviceModule;
+class CallFactoryInterface;
+class AudioEncoderFactory;
+class AudioDecoderFactory;
+class RtcEventLogFactoryInterface;
+class AudioMixer;
+}  // namespace webrtc
+
+namespace cricket {
+class MediaEngineInterface;
+class WebRtcVideoEncoderFactory;
+class WebRtcVideoDecoderFactory;
+}  // namespace cricket
+
+namespace webrtc_jni {
+
+webrtc::CallFactoryInterface* CreateCallFactory();
+webrtc::RtcEventLogFactoryInterface* CreateRtcEventLogFactory();
+
+cricket::MediaEngineInterface* CreateMediaEngine(
+    webrtc::AudioDeviceModule* adm,
+    const rtc::scoped_refptr<webrtc::AudioEncoderFactory>&
+        audio_encoder_factory,
+    const rtc::scoped_refptr<webrtc::AudioDecoderFactory>&
+        audio_decoder_factory,
+    cricket::WebRtcVideoEncoderFactory* video_encoder_factory,
+    cricket::WebRtcVideoDecoderFactory* video_decoder_factory,
+    rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer);
+
+}  // namespace webrtc_jni
+
+#endif  // WEBRTC_SDK_ANDROID_SRC_JNI_MEDIA_JNI_H_