Replace NULL with nullptr in all C++ files.

webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc

Index: webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc
diff --git a/webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc b/webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc
index c89f902a62a449703c396223a97a78872eeae29e..30d2b8c508b7edde01482674fda9917374656534 100644
--- a/webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc
+++ b/webrtc/sdk/android/src/jni/androidmediadecoder_jni.cc
@@ -74,11 +74,11 @@ class MediaCodecVideoDecoder : public webrtc::VideoDecoder,
   int32_t InitDecode(const VideoCodec* codecSettings, int32_t numberOfCores)
       override;
 
-  int32_t Decode(
-      const EncodedImage& inputImage, bool missingFrames,
-      const RTPFragmentationHeader* fragmentation,
-      const CodecSpecificInfo* codecSpecificInfo = NULL,
-      int64_t renderTimeMs = -1) override;
+  int32_t Decode(const EncodedImage& inputImage,
+                 bool missingFrames,
+                 const RTPFragmentationHeader* fragmentation,
+                 const CodecSpecificInfo* codecSpecificInfo = nullptr,
+                 int64_t renderTimeMs = -1) override;
 
   int32_t RegisterDecodeCompleteCallback(DecodedImageCallback* callback)
       override;
@@ -195,7 +195,7 @@ MediaCodecVideoDecoder::MediaCodecVideoDecoder(
                               "<init>",
                               "()V"))) {
   ScopedLocalRefFrame local_ref_frame(jni);
-  codec_thread_->SetName("MediaCodecVideoDecoder", NULL);
+  codec_thread_->SetName("MediaCodecVideoDecoder", nullptr);
   RTC_CHECK(codec_thread_->Start()) << "Failed to start MediaCodecVideoDecoder";
 
   j_init_decode_method_ = GetMethodID(
@@ -272,7 +272,7 @@ MediaCodecVideoDecoder::MediaCodecVideoDecoder(
       jni, j_decoded_output_buffer_class, "decodeTimeMs", "J");
 
   CHECK_EXCEPTION(jni) << "MediaCodecVideoDecoder ctor failed";
-  use_surface_ = (render_egl_context_ != NULL);
+  use_surface_ = (render_egl_context_ != nullptr);
   ALOGD << "MediaCodecVideoDecoder ctor. Use surface: " << use_surface_;
   memset(&codec_, 0, sizeof(codec_));
   AllowBlockingCalls();
@@ -286,8 +286,8 @@ MediaCodecVideoDecoder::~MediaCodecVideoDecoder() {
 int32_t MediaCodecVideoDecoder::InitDecode(const VideoCodec* inst,
     int32_t numberOfCores) {
   ALOGD << "InitDecode.";
-  if (inst == NULL) {
-    ALOGE << "NULL VideoCodec instance";
+  if (inst == nullptr) {
+    ALOGE << "null VideoCodec instance";
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   }
   // Factory should guard against other codecs being used with us.
@@ -514,11 +514,11 @@ int32_t MediaCodecVideoDecoder::Decode(
     ALOGE << "Decode() - fallback to SW codec";
     return WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE;
   }
-  if (callback_ == NULL) {
-    ALOGE << "Decode() - callback_ is NULL";
+  if (callback_ == nullptr) {
+    ALOGE << "Decode() - callback_ is null";
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
-  if (inputImage._buffer == NULL && inputImage._length > 0) {
+  if (inputImage._buffer == nullptr && inputImage._length > 0) {
     ALOGE << "Decode() - inputImage is incorrect";
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
   }