Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_coding/test/insert_packet_with_timing.cc

Index: webrtc/modules/audio_coding/test/insert_packet_with_timing.cc
diff --git a/webrtc/modules/audio_coding/test/insert_packet_with_timing.cc b/webrtc/modules/audio_coding/test/insert_packet_with_timing.cc
index 44ef9df7d9fa94f03461b57077560dcf298fe0dd..d4ab0286c7cd0722d689479e755e82ac418008aa 100644
--- a/webrtc/modules/audio_coding/test/insert_packet_with_timing.cc
+++ b/webrtc/modules/audio_coding/test/insert_packet_with_timing.cc
@@ -74,18 +74,18 @@ class InsertPacketWithTiming {
         playout_timing_fid_(fopen("playout_timing.txt", "wt")) {}
 
   void SetUp() {
-    ASSERT_TRUE(sender_clock_ != NULL);
-    ASSERT_TRUE(receiver_clock_ != NULL);
+    ASSERT_TRUE(sender_clock_ != nullptr);
+    ASSERT_TRUE(receiver_clock_ != nullptr);
 
-    ASSERT_TRUE(send_acm_.get() != NULL);
-    ASSERT_TRUE(receive_acm_.get() != NULL);
-    ASSERT_TRUE(channel_ != NULL);
+    ASSERT_TRUE(send_acm_.get() != nullptr);
+    ASSERT_TRUE(receive_acm_.get() != nullptr);
+    ASSERT_TRUE(channel_ != nullptr);
 
-    ASSERT_TRUE(seq_num_fid_ != NULL);
-    ASSERT_TRUE(send_ts_fid_ != NULL);
-    ASSERT_TRUE(receive_ts_fid_ != NULL);
+    ASSERT_TRUE(seq_num_fid_ != nullptr);
+    ASSERT_TRUE(send_ts_fid_ != nullptr);
+    ASSERT_TRUE(receive_ts_fid_ != nullptr);
 
-    ASSERT_TRUE(playout_timing_fid_ != NULL);
+    ASSERT_TRUE(playout_timing_fid_ != nullptr);
 
     next_receive_ts_ = ReceiveTimestamp();
 
@@ -119,7 +119,7 @@ class InsertPacketWithTiming {
       pcm_in_fid_.ReadStereo(FLAGS_input_stereo);
     }
 
-    ASSERT_TRUE(pcm_out_fid_ != NULL);
+    ASSERT_TRUE(pcm_out_fid_ != nullptr);
     std::cout << "Output file " << FLAGS_output << " at " << FLAGS_output_fs_hz
         << " Hz." << std::endl;
 
@@ -283,10 +283,10 @@ int main(int argc, char* argv[]) {
   webrtc::InsertPacketWithTiming test;
   test.SetUp();
 
-  FILE* delay_log = NULL;
+  FILE* delay_log = nullptr;
   if (FLAGS_delay.size() > 0) {
     delay_log = fopen(FLAGS_delay.c_str(), "wt");
-    if (delay_log == NULL) {
+    if (delay_log == nullptr) {
       std::cout << "Cannot open the file to log delay values." << std::endl;
       exit(1);
     }
@@ -300,13 +300,13 @@ int main(int argc, char* argv[]) {
 
     if (action_taken != 0) {
       test.Delay(&optimal_delay_ms, &current_delay_ms);
-      if (delay_log != NULL) {
+      if (delay_log != nullptr) {
         fprintf(delay_log, "%3d %3d\n", optimal_delay_ms, current_delay_ms);
       }
     }
   }
   std::cout << std::endl;
   test.TearDown();
-  if (delay_log != NULL)
+  if (delay_log != nullptr)
     fclose(delay_log);
 }