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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/utils/debugger/SkDebugCanvas.cpp b/src/utils/debugger/SkDebugCanvas.cpp
index 5ce9067..f163cc5 100644
--- a/src/utils/debugger/SkDebugCanvas.cpp
+++ b/src/utils/debugger/SkDebugCanvas.cpp
@@ -50,7 +50,7 @@
         return gTable[idx];
     }
 
-    Factory getFactory() const override { return NULL; }
+    Factory getFactory() const override { return nullptr; }
 #ifndef SK_IGNORE_TO_STRING
     void toString(SkString* str) const override { str->set("OverdrawXfermode"); }
 #endif
@@ -64,13 +64,13 @@
                            bool overrideFilterQuality,
                            SkFilterQuality quality)
         : INHERITED(width, height)
-        , fOverdrawXfermode(overdrawViz ? new OverdrawXfermode : NULL)
+        , fOverdrawXfermode(overdrawViz ? new OverdrawXfermode : nullptr)
         , fOverrideFilterQuality(overrideFilterQuality)
         , fFilterQuality(quality) {}
 
 protected:
     void onFilterPaint(SkPaint* paint, Type) const override {
-        if (NULL != fOverdrawXfermode.get()) {
+        if (nullptr != fOverdrawXfermode.get()) {
             paint->setAntiAlias(false);
             paint->setXfermode(fOverdrawXfermode.get());
         }
@@ -100,7 +100,7 @@
 
 SkDebugCanvas::SkDebugCanvas(int width, int height)
         : INHERITED(width, height)
-        , fPicture(NULL)
+        , fPicture(nullptr)
         , fFilter(false)
         , fMegaVizMode(false)
         , fOverdrawViz(false)
@@ -359,7 +359,7 @@
 
 void SkDebugCanvas::updatePaintFilterCanvas() {
     if (!fOverdrawViz && !fOverrideFilterQuality) {
-        fPaintFilterCanvas.reset(NULL);
+        fPaintFilterCanvas.reset(nullptr);
         return;
     }
 
@@ -515,7 +515,7 @@
                                    SkXfermode*, const uint16_t indices[], int indexCount,
                                    const SkPaint& paint) {
     this->addDrawCommand(new SkDrawVerticesCommand(vmode, vertexCount, vertices,
-                         texs, colors, NULL, indices, indexCount, paint));
+                         texs, colors, nullptr, indices, indexCount, paint));
 }
 
 void SkDebugCanvas::willRestore() {