Style Change: NULL->nullptr

src/effects/SkAlphaThresholdFilter.cpp

Index: src/effects/SkAlphaThresholdFilter.cpp
diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index f6d146169ace331383ddce4636228295e8129554..0f96cdf59a1118ac922e35fa4ac3ee8e633efc51 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -282,7 +282,7 @@ bool SkAlphaThresholdFilterImpl::asFragmentProcessor(GrFragmentProcessor** fp,
             GrPaint grPaint;
             grPaint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
             SkRegion::Iterator iter(fRegion);
-            drawContext->clear(maskTexture->asRenderTarget(), NULL, 0x0, true);
+            drawContext->clear(maskTexture->asRenderTarget(), nullptr, 0x0, true);
 
             while (!iter.done()) {
                 SkRect rect = SkRect::Make(iter.rect());