Allow shaped-desktop hosts to send shape only when it changes.

remoting/codec/audio_decoder_opus.cc

Index: remoting/codec/audio_decoder_opus.cc
diff --git a/remoting/codec/audio_decoder_opus.cc b/remoting/codec/audio_decoder_opus.cc
index 27f01fd91ce3082b0c2964093793eab997414b32..8fc2f11c4af7f461a430712df8ba1341176daf55 100644
--- a/remoting/codec/audio_decoder_opus.cc
+++ b/remoting/codec/audio_decoder_opus.cc
@@ -26,9 +26,7 @@ const AudioPacket::SamplingRate kSamplingRate =
 }  // namespace
 
 AudioDecoderOpus::AudioDecoderOpus()
-    : sampling_rate_(0),
-      channels_(0),
-      decoder_(NULL) {
+    : sampling_rate_(0), channels_(0), decoder_(nullptr) {
 }
 
 AudioDecoderOpus::~AudioDecoderOpus() {
@@ -47,7 +45,7 @@ void AudioDecoderOpus::InitDecoder() {
 void AudioDecoderOpus::DestroyDecoder() {
   if (decoder_) {
     opus_decoder_destroy(decoder_);
-    decoder_ = NULL;
+    decoder_ = nullptr;
   }
 }
 
@@ -72,7 +70,7 @@ bool AudioDecoderOpus::ResetForPacket(AudioPacket* packet) {
     InitDecoder();
   }
 
-  return decoder_ != NULL;
+  return decoder_;
 }