Style Change: NULL->nullptr
DOCS_PREVIEW= https://skia.org/?cl=1316233002

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/ports/SkImageDecoder_empty.cpp b/src/ports/SkImageDecoder_empty.cpp
index e6cca08..d248f14 100644
--- a/src/ports/SkImageDecoder_empty.cpp
+++ b/src/ports/SkImageDecoder_empty.cpp
@@ -22,7 +22,7 @@
 SkImageDecoder::~SkImageDecoder() {}
 
 SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable*) {
-    return NULL;
+    return nullptr;
 }
 
 void SkImageDecoder::copyFieldsToOther(SkImageDecoder* ) {}
@@ -67,15 +67,15 @@
 }
 
 const char* SkImageDecoder::GetFormatName(Format) {
-    return NULL;
+    return nullptr;
 }
 
 SkImageDecoder::Peeker* SkImageDecoder::setPeeker(Peeker*) {
-    return NULL;
+    return nullptr;
 }
 
 SkBitmap::Allocator* SkImageDecoder::setAllocator(SkBitmap::Allocator*) {
-    return NULL;
+    return nullptr;
 }
 
 void SkImageDecoder::setSampleSize(int) {}
@@ -94,7 +94,7 @@
 // Empty implementation for SkMovie.
 
 SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) {
-    return NULL;
+    return nullptr;
 }
 
 /////////////////////////////////////////////////////////////////////////
@@ -102,7 +102,7 @@
 // Empty implementations for SkImageEncoder.
 
 SkImageEncoder* SkImageEncoder::Create(Type t) {
-    return NULL;
+    return nullptr;
 }
 
 bool SkImageEncoder::EncodeFile(const char file[], const SkBitmap&, Type, int quality) {
@@ -114,7 +114,7 @@
 }
 
 SkData* SkImageEncoder::EncodeData(const SkBitmap&, Type, int quality) {
-    return NULL;
+    return nullptr;
 }
 
 bool SkImageEncoder::encodeStream(SkWStream*, const SkBitmap&, int) {
@@ -122,7 +122,7 @@
 }
 
 SkData* SkImageEncoder::encodeData(const SkBitmap&, int) {
-    return NULL;
+    return nullptr;
 }
 
 bool SkImageEncoder::encodeFile(const char file[], const SkBitmap& bm, int quality) {