Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_coding/neteq/test/RTPjitter.cc

Index: webrtc/modules/audio_coding/neteq/test/RTPjitter.cc
diff --git a/webrtc/modules/audio_coding/neteq/test/RTPjitter.cc b/webrtc/modules/audio_coding/neteq/test/RTPjitter.cc
index 391f051f30c15a4b7fbfa8002343ad4ff6c1079f..fdbdfcb4b2ccacbf25a043895cd9b6583d13dce9 100644
--- a/webrtc/modules/audio_coding/neteq/test/RTPjitter.cc
+++ b/webrtc/modules/audio_coding/neteq/test/RTPjitter.cc
@@ -33,9 +33,12 @@
 /*********************/
 
 #define FIRSTLINELEN 40
-#define CHECK_NOT_NULL(a) if((a)==NULL){ \
-    fprintf(stderr,"\n %s \n line: %d \nerror at %s\n",__FILE__,__LINE__,#a ); \
-    return(-1);}
+#define CHECK_NOT_NULL(a)                                                    \
+  if ((a) == nullptr) {                                                      \
+    fprintf(stderr, "\n %s \n line: %d \nerror at %s\n", __FILE__, __LINE__, \
+            #a);                                                             \
+    return (-1);                                                             \
+  }
 
 struct arr_time {
   float time;
@@ -66,9 +69,9 @@ int main(int argc, char* argv[])
   unsigned int  dat_len, rtp_len, Npack, k;
   arr_time    *time_vec;
   char      firstline[FIRSTLINELEN];
-  unsigned char* rtp_vec = NULL;
-        unsigned char** packet_ptr = NULL;
-        unsigned char* temp_packet = NULL;
+  unsigned char* rtp_vec = nullptr;
+  unsigned char** packet_ptr = nullptr;
+  unsigned char* temp_packet = nullptr;
   const unsigned int kRtpDumpHeaderSize = 4 + 4 + 4 + 2 + 2;
   uint16_t      len;
   uint32_t      *offset;
@@ -110,7 +113,7 @@ int main(int argc, char* argv[])
   // add 1000 bytes to avoid (rare) strange error.
   time_vec = (arr_time *) malloc(sizeof(arr_time)
                                  *(filelen(dat_file)/sizeof(float)) + 1000);
-  if (time_vec==NULL) {
+  if (time_vec == nullptr) {
     fprintf(stderr, "Error: could not allocate memory for reading dat file\n");
     goto closing;
   }
@@ -130,13 +133,13 @@ int main(int argc, char* argv[])
 
 
   rtp_vec = (unsigned char *) malloc(sizeof(unsigned char)*filelen(in_file));
-  if (rtp_vec==NULL) {
+  if (rtp_vec == nullptr) {
     fprintf(stderr,"Error: could not allocate memory for reading rtp file\n");
     goto closing;
   }
 
   // read file header and write directly to output file
-  EXPECT_TRUE(fgets(firstline, FIRSTLINELEN, in_file) != NULL);
+  EXPECT_TRUE(fgets(firstline, FIRSTLINELEN, in_file) != nullptr);
   EXPECT_GT(fputs(firstline, out_file), 0);
   EXPECT_EQ(kRtpDumpHeaderSize, fread(firstline, 1, kRtpDumpHeaderSize,
                                       in_file));
@@ -206,7 +209,7 @@ int main(int argc, char* argv[])
 closing:
   free(time_vec);
   free(rtp_vec);
-        if (packet_ptr != NULL) {
+  if (packet_ptr != nullptr) {
     free(packet_ptr);
         }
         fclose(in_file);