Replace NULL with nullptr in all C++ files.

webrtc/test/testsupport/metrics/video_metrics.cc

Index: webrtc/test/testsupport/metrics/video_metrics.cc
diff --git a/webrtc/test/testsupport/metrics/video_metrics.cc b/webrtc/test/testsupport/metrics/video_metrics.cc
index 289533763c857871485eadb706987ef6b4cfbf15..8f88715ab3630fa7470465ea20ecbebc7dab92d8 100644
--- a/webrtc/test/testsupport/metrics/video_metrics.cc
+++ b/webrtc/test/testsupport/metrics/video_metrics.cc
@@ -57,9 +57,9 @@ void CalculateFrame(VideoMetricsType video_metrics_type,
   result->frames.push_back(frame_result);
 }
 
-// Calculates average, min and max values for the supplied struct, if non-NULL.
+// Calculates average, min and max values for the supplied struct, if non-null.
 void CalculateStats(QualityMetricsResult* result) {
-  if (result == NULL || result->frames.size() == 0) {
+  if (result == nullptr || result->frames.size() == 0) {
     return;
   }
   // Calculate average.
@@ -82,7 +82,7 @@ void CalculateStats(QualityMetricsResult* result) {
 }
 
 // Single method that handles all combinations of video metrics calculation, to
-// minimize code duplication. Either psnr_result or ssim_result may be NULL,
+// minimize code duplication. Either psnr_result or ssim_result may be null,
 // depending on which VideoMetricsType is targeted.
 int CalculateMetrics(VideoMetricsType video_metrics_type,
                      const char* ref_filename,
@@ -91,19 +91,19 @@ int CalculateMetrics(VideoMetricsType video_metrics_type,
                      int height,
                      QualityMetricsResult* psnr_result,
                      QualityMetricsResult* ssim_result) {
-  assert(ref_filename != NULL);
-  assert(test_filename != NULL);
+  assert(ref_filename != nullptr);
+  assert(test_filename != nullptr);
   assert(width > 0);
   assert(height > 0);
 
   FILE* ref_fp = fopen(ref_filename, "rb");
-  if (ref_fp == NULL) {
+  if (ref_fp == nullptr) {
     // Cannot open reference file.
     fprintf(stderr, "Cannot open file %s\n", ref_filename);
     return -1;
   }
   FILE* test_fp = fopen(test_filename, "rb");
-  if (test_fp == NULL) {
+  if (test_fp == nullptr) {
     // Cannot open test file.
     fprintf(stderr, "Cannot open file %s\n", test_filename);
     fclose(ref_fp);
@@ -163,8 +163,8 @@ int I420MetricsFromFiles(const char* ref_filename,
                          int height,
                          QualityMetricsResult* psnr_result,
                          QualityMetricsResult* ssim_result) {
-  assert(psnr_result != NULL);
-  assert(ssim_result != NULL);
+  assert(psnr_result != nullptr);
+  assert(ssim_result != nullptr);
   return CalculateMetrics(kBoth, ref_filename, test_filename, width, height,
                           psnr_result, ssim_result);
 }
@@ -174,9 +174,9 @@ int I420PSNRFromFiles(const char* ref_filename,
                       int width,
                       int height,
                       QualityMetricsResult* result) {
-  assert(result != NULL);
+  assert(result != nullptr);
   return CalculateMetrics(kPSNR, ref_filename, test_filename, width, height,
-                          result, NULL);
+                          result, nullptr);
 }
 
 int I420SSIMFromFiles(const char* ref_filename,
@@ -184,9 +184,9 @@ int I420SSIMFromFiles(const char* ref_filename,
                       int width,
                       int height,
                       QualityMetricsResult* result) {
-  assert(result != NULL);
+  assert(result != nullptr);
   return CalculateMetrics(kSSIM, ref_filename, test_filename, width, height,
-                          NULL, result);
+                          nullptr, result);
 }
 
 }  // namespace test