Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_coding/codecs/g711/test/testG711.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 18 matching lines @@
   if (rlen >= length)
     return false;
   memset(data + rlen, 0, (length - rlen) * sizeof(int16_t));
   return true;
 }
 
 int main(int argc, char* argv[]) {
   char inname[80], outname[40], bitname[40];
   FILE* inp;
   FILE* outp;
-  FILE* bitp = NULL;
+  FILE* bitp = nullptr;
   int framecnt;
   bool endfile;
 
   size_t framelength = 80;
 
   /* Runtime statistics */
   double starttime;
   double runtime;
   double length_file;
 
@@ skipping 36 matching lines @@
   framelength = static_cast<size_t>(framelength_int);
 
   /* Get compression law */
   strcpy(law, argv[2]);
 
   /* Get Input and Output files */
   sscanf(argv[3], "%s", inname);
   sscanf(argv[4], "%s", outname);
   if (argc == 6) {
     sscanf(argv[5], "%s", bitname);
-    if ((bitp = fopen(bitname, "wb")) == NULL) {
+    if ((bitp = fopen(bitname, "wb")) == nullptr) {
       printf("  G.711: Cannot read file %s.\n", bitname);
       exit(1);
     }
   }
 
-  if ((inp = fopen(inname, "rb")) == NULL) {
+  if ((inp = fopen(inname, "rb")) == nullptr) {
     printf("  G.711: Cannot read file %s.\n", inname);
     exit(1);
   }
-  if ((outp = fopen(outname, "wb")) == NULL) {
+  if ((outp = fopen(outname, "wb")) == nullptr) {
     printf("  G.711: Cannot write file %s.\n", outname);
     exit(1);
   }
   printf("\nInput:  %s\nOutput: %s\n", inname, outname);
   if (argc == 6) {
     printf("\nBitfile:  %s\n", bitname);
   }
 
   starttime = clock() / (double) CLOCKS_PER_SEC_G711; /* Runtime statistics */
 
@@ skipping 44 matching lines @@
   printf("Time to run G.711:      %.2f s (%.2f %% of realtime)\n\n",
          runtime,
          (100 * runtime / length_file));
   printf("---------------------END----------------------\n");
 
   fclose(inp);
   fclose(outp);
 
   return 0;
 }