Replace NULL with nullptr in all C++ files.

webrtc/sdk/android/src/jni/peerconnection_jni.cc

Index: webrtc/sdk/android/src/jni/peerconnection_jni.cc
diff --git a/webrtc/sdk/android/src/jni/peerconnection_jni.cc b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
index d3f23445d615e708049db976c0e6c8b9b50f3790..36aeb50c41e6d624ef39f76194f98dc2deea05e3 100644
--- a/webrtc/sdk/android/src/jni/peerconnection_jni.cc
+++ b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
@@ -116,7 +116,7 @@ using webrtc::kVideoCodecVP8;
 namespace webrtc_jni {
 
 // Field trials initialization string
-static char *field_trials_init_string = NULL;
+static char* field_trials_init_string = nullptr;
 
 // Set in PeerConnectionFactory_initializeAndroidGlobals().
 static bool factory_static_initialized = false;
@@ -489,7 +489,7 @@ class PCOJava : public PeerConnectionObserver {
       const std::vector<cricket::Candidate>& candidates) {
     jclass candidate_class = FindClass(jni, "org/webrtc/IceCandidate");
     jobjectArray java_candidates =
-        jni->NewObjectArray(candidates.size(), candidate_class, NULL);
+        jni->NewObjectArray(candidates.size(), candidate_class, nullptr);
     int i = 0;
     for (const cricket::Candidate& candidate : candidates) {
       jobject j_candidate = ToJavaCandidate(jni, &candidate_class, candidate);
@@ -794,8 +794,8 @@ class StatsObserverWrapper : public StatsObserver {
  private:
   jobjectArray ReportsToJava(
       JNIEnv* jni, const StatsReports& reports) {
-    jobjectArray reports_array = jni->NewObjectArray(
-        reports.size(), *j_stats_report_class_, NULL);
+    jobjectArray reports_array =
+        jni->NewObjectArray(reports.size(), *j_stats_report_class_, nullptr);
     int i = 0;
     for (const auto* report : reports) {
       ScopedLocalRefFrame local_ref_frame(jni);
@@ -814,8 +814,8 @@ class StatsObserverWrapper : public StatsObserver {
   }
 
   jobjectArray ValuesToJava(JNIEnv* jni, const StatsReport::Values& values) {
-    jobjectArray j_values = jni->NewObjectArray(
-        values.size(), *j_value_class_, NULL);
+    jobjectArray j_values =
+        jni->NewObjectArray(values.size(), *j_value_class_, nullptr);
     int i = 0;
     for (const auto& it : values) {
       ScopedLocalRefFrame local_ref_frame(jni);
@@ -888,12 +888,13 @@ class JavaVideoRendererWrapper
   // Return a VideoRenderer.I420Frame referring to the data in |frame|.
   jobject CricketToJavaI420Frame(const webrtc::VideoFrame* frame) {
     jintArray strides = jni()->NewIntArray(3);
-    jint* strides_array = jni()->GetIntArrayElements(strides, NULL);
+    jint* strides_array = jni()->GetIntArrayElements(strides, nullptr);
     strides_array[0] = frame->video_frame_buffer()->StrideY();
     strides_array[1] = frame->video_frame_buffer()->StrideU();
     strides_array[2] = frame->video_frame_buffer()->StrideV();
     jni()->ReleaseIntArrayElements(strides, strides_array, 0);
-    jobjectArray planes = jni()->NewObjectArray(3, *j_byte_buffer_class_, NULL);
+    jobjectArray planes =
+        jni()->NewObjectArray(3, *j_byte_buffer_class_, nullptr);
     jobject y_buffer = jni()->NewDirectByteBuffer(
         const_cast<uint8_t*>(frame->video_frame_buffer()->DataY()),
         frame->video_frame_buffer()->StrideY() *
@@ -1019,7 +1020,7 @@ JOW(void, DataChannel_close)(JNIEnv* jni, jobject j_dc) {
 
 JOW(jboolean, DataChannel_sendNative)(JNIEnv* jni, jobject j_dc,
                                       jbyteArray data, jboolean binary) {
-  jbyte* bytes = jni->GetByteArrayElements(data, NULL);
+  jbyte* bytes = jni->GetByteArrayElements(data, nullptr);
   bool ret = ExtractNativeDC(jni, j_dc)->Send(DataBuffer(
       rtc::CopyOnWriteBuffer(bytes, jni->GetArrayLength(data)),
       binary));
@@ -1157,10 +1158,10 @@ JOW(jboolean, PeerConnectionFactory_initializeAndroidGlobals)
 
 JOW(void, PeerConnectionFactory_initializeFieldTrials)(
     JNIEnv* jni, jclass, jstring j_trials_init_string) {
-  field_trials_init_string = NULL;
-  if (j_trials_init_string != NULL) {
+  field_trials_init_string = nullptr;
+  if (j_trials_init_string != nullptr) {
     const char* init_string =
-        jni->GetStringUTFChars(j_trials_init_string, NULL);
+        jni->GetStringUTFChars(j_trials_init_string, nullptr);
     int init_string_length = jni->GetStringUTFLength(j_trials_init_string);
     field_trials_init_string = new char[init_string_length + 1];
     rtc::strcpyn(field_trials_init_string, init_string_length + 1, init_string);
@@ -1186,7 +1187,7 @@ JOW(jboolean, PeerConnectionFactory_startInternalTracingCapture)(
     return false;
 
   const char* init_string =
-      jni->GetStringUTFChars(j_event_tracing_filename, NULL);
+      jni->GetStringUTFChars(j_event_tracing_filename, nullptr);
   LOG(LS_INFO) << "Starting internal tracing to: " << init_string;
   bool ret = rtc::tracing::StartInternalCapture(init_string);
   jni->ReleaseStringUTFChars(j_event_tracing_filename, init_string);
@@ -1337,7 +1338,7 @@ JOW(jlong, PeerConnectionFactory_nativeCreatePeerConnectionFactory)(
   RTC_CHECK(worker_thread->Start()) << "Failed to start thread";
 
   std::unique_ptr<Thread> signaling_thread = rtc::Thread::Create();
-  signaling_thread->SetName("signaling_thread", NULL);
+  signaling_thread->SetName("signaling_thread", nullptr);
   RTC_CHECK(signaling_thread->Start()) << "Failed to start thread";
 
   WebRtcVideoEncoderFactory* encoder_factory = nullptr;
@@ -1345,7 +1346,7 @@ JOW(jlong, PeerConnectionFactory_nativeCreatePeerConnectionFactory)(
   rtc::NetworkMonitorFactory* network_monitor_factory = nullptr;
 
   PeerConnectionFactoryInterface::Options options;
-  bool has_options = joptions != NULL;
+  bool has_options = joptions != nullptr;
   if (has_options) {
     options = ParseOptionsFromJava(jni, joptions);
   }
@@ -1383,9 +1384,9 @@ JOW(jlong, PeerConnectionFactory_nativeCreatePeerConnectionFactory)(
 JOW(void, PeerConnectionFactory_nativeFreeFactory)(JNIEnv*, jclass, jlong j_p) {
   delete reinterpret_cast<OwnedFactoryAndThreads*>(j_p);
   if (field_trials_init_string) {
-    webrtc::field_trial::InitFieldTrialsFromString(NULL);
+    webrtc::field_trial::InitFieldTrialsFromString(nullptr);
     delete field_trials_init_string;
-    field_trials_init_string = NULL;
+    field_trials_init_string = nullptr;
   }
   webrtc::Trace::ReturnTrace();
 }
@@ -1879,13 +1880,13 @@ static rtc::scoped_refptr<PeerConnectionInterface> ExtractNativePC(
 JOW(jobject, PeerConnection_getLocalDescription)(JNIEnv* jni, jobject j_pc) {
   const SessionDescriptionInterface* sdp =
       ExtractNativePC(jni, j_pc)->local_description();
-  return sdp ? JavaSdpFromNativeSdp(jni, sdp) : NULL;
+  return sdp ? JavaSdpFromNativeSdp(jni, sdp) : nullptr;
 }
 
 JOW(jobject, PeerConnection_getRemoteDescription)(JNIEnv* jni, jobject j_pc) {
   const SessionDescriptionInterface* sdp =
       ExtractNativePC(jni, j_pc)->remote_description();
-  return sdp ? JavaSdpFromNativeSdp(jni, sdp) : NULL;
+  return sdp ? JavaSdpFromNativeSdp(jni, sdp) : nullptr;
 }
 
 JOW(jobject, PeerConnection_createDataChannel)(
@@ -1954,16 +1955,15 @@ static SessionDescriptionInterface* JavaSdpToNativeSdp(
   jstring j_description = (jstring)GetObjectField(jni, j_sdp, j_description_id);
   std::string std_description = JavaToStdString(jni, j_description);
 
-  return webrtc::CreateSessionDescription(
-      std_type, std_description, NULL);
+  return webrtc::CreateSessionDescription(std_type, std_description, nullptr);
 }
 
 JOW(void, PeerConnection_setLocalDescription)(
     JNIEnv* jni, jobject j_pc,
     jobject j_observer, jobject j_sdp) {
   rtc::scoped_refptr<SetSdpObserverWrapper> observer(
-      new rtc::RefCountedObject<SetSdpObserverWrapper>(
-          jni, j_observer, reinterpret_cast<ConstraintsWrapper*>(NULL)));
+      new rtc::RefCountedObject<SetSdpObserverWrapper>(jni, j_observer,
+                                                       nullptr));
   ExtractNativePC(jni, j_pc)->SetLocalDescription(
       observer, JavaSdpToNativeSdp(jni, j_sdp));
 }
@@ -1972,8 +1972,8 @@ JOW(void, PeerConnection_setRemoteDescription)(
     JNIEnv* jni, jobject j_pc,
     jobject j_observer, jobject j_sdp) {
   rtc::scoped_refptr<SetSdpObserverWrapper> observer(
-      new rtc::RefCountedObject<SetSdpObserverWrapper>(
-          jni, j_observer, reinterpret_cast<ConstraintsWrapper*>(NULL)));
+      new rtc::RefCountedObject<SetSdpObserverWrapper>(jni, j_observer,
+                                                       nullptr));
   ExtractNativePC(jni, j_pc)->SetRemoteDescription(
       observer, JavaSdpToNativeSdp(jni, j_sdp));
 }
@@ -1996,7 +1996,7 @@ JOW(jboolean, PeerConnection_nativeAddIceCandidate)(
   std::string sdp_mid = JavaToStdString(jni, j_sdp_mid);
   std::string sdp = JavaToStdString(jni, j_candidate_sdp);
   std::unique_ptr<IceCandidateInterface> candidate(
-      webrtc::CreateIceCandidate(sdp_mid, j_sdp_mline_index, sdp, NULL));
+      webrtc::CreateIceCandidate(sdp_mid, j_sdp_mline_index, sdp, nullptr));
   return ExtractNativePC(jni, j_pc)->AddIceCandidate(candidate.get());
 }
 
@@ -2012,7 +2012,7 @@ static cricket::Candidate GetCandidateFromJava(JNIEnv* jni,
   std::string sdp =
       JavaToStdString(jni, GetStringField(jni, j_candidate, j_sdp_id));
   cricket::Candidate candidate;
-  if (!webrtc::SdpDeserializeCandidate(sdp_mid, sdp, &candidate, NULL)) {
+  if (!webrtc::SdpDeserializeCandidate(sdp_mid, sdp, &candidate, nullptr)) {
     LOG(LS_ERROR) << "SdpDescrializeCandidate failed with sdp " << sdp;
   }
   return candidate;