Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_processing/transient/transient_suppressor.cc

Index: webrtc/modules/audio_processing/transient/transient_suppressor.cc
diff --git a/webrtc/modules/audio_processing/transient/transient_suppressor.cc b/webrtc/modules/audio_processing/transient/transient_suppressor.cc
index 46bb574c0be2f40aa4d80252c73c83543955f693..394bd3b813ad2f702477a3e732e7cc98707da6a0 100644
--- a/webrtc/modules/audio_processing/transient/transient_suppressor.cc
+++ b/webrtc/modules/audio_processing/transient/transient_suppressor.cc
@@ -51,7 +51,7 @@ TransientSuppressor::TransientSuppressor()
       buffer_delay_(0),
       complex_analysis_length_(0),
       num_channels_(0),
-      window_(NULL),
+      window_(nullptr),
       detector_smoothed_(0.f),
       keypress_counter_(0),
       chunks_since_keypress_(0),
@@ -60,8 +60,7 @@ TransientSuppressor::TransientSuppressor()
       use_hard_restoration_(false),
       chunks_since_voice_change_(0),
       seed_(182),
-      using_reference_(false) {
-}
+      using_reference_(false) {}
 
 TransientSuppressor::~TransientSuppressor() {}