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

webrtc/sdk/android/src/jni/pc/statsobserver_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_PC_STATSOBSERVER_JNI_H_
-#define WEBRTC_SDK_ANDROID_SRC_JNI_PC_STATSOBSERVER_JNI_H_
-
-#include "webrtc/api/peerconnectioninterface.h"
-#include "webrtc/sdk/android/src/jni/jni_helpers.h"
-
-namespace webrtc_jni {
-
-// Adapter for a Java StatsObserver presenting a C++ webrtc::StatsObserver and
-// dispatching the callback from C++ back to Java.
-class StatsObserverJni : public webrtc::StatsObserver {
- public:
-  StatsObserverJni(JNIEnv* jni, jobject j_observer);
-
-  void OnComplete(const webrtc::StatsReports& reports) override;
-
- private:
-  jobjectArray ReportsToJava(JNIEnv* jni, const webrtc::StatsReports& reports);
-
-  jobjectArray ValuesToJava(JNIEnv* jni,
-                            const webrtc::StatsReport::Values& values);
-
-  const ScopedGlobalRef<jobject> j_observer_global_;
-  const ScopedGlobalRef<jclass> j_observer_class_;
-  const ScopedGlobalRef<jclass> j_stats_report_class_;
-  const jmethodID j_stats_report_ctor_;
-  const ScopedGlobalRef<jclass> j_value_class_;
-  const jmethodID j_value_ctor_;
-};
-
-}  // namespace webrtc_jni
-
-#endif  // WEBRTC_SDK_ANDROID_SRC_JNI_PC_STATSOBSERVER_JNI_H_