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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/gm/textblobshader.cpp b/gm/textblobshader.cpp
index 5c9372d..30674e1 100644
--- a/gm/textblobshader.cpp
+++ b/gm/textblobshader.cpp
@@ -22,7 +22,7 @@
         SkPaint p;
         sk_tool_utils::set_portable_typeface(&p);
         size_t txtLen = strlen(txt);
-        fGlyphs.append(p.textToGlyphs(txt, txtLen, NULL));
+        fGlyphs.append(p.textToGlyphs(txt, txtLen, nullptr));
         p.textToGlyphs(txt, txtLen, fGlyphs.begin());
     }
 
@@ -40,16 +40,16 @@
         int glyphCount = fGlyphs.count();
         const SkTextBlobBuilder::RunBuffer* run;
 
-        run = &builder.allocRun(p, glyphCount, 10, 10, NULL);
+        run = &builder.allocRun(p, glyphCount, 10, 10, nullptr);
         memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
 
-        run = &builder.allocRunPosH(p, glyphCount,  80, NULL);
+        run = &builder.allocRunPosH(p, glyphCount,  80, nullptr);
         memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
         for (int i = 0; i < glyphCount; ++i) {
             run->pos[i] = p.getTextSize() * i * .75f;
         }
 
-        run = &builder.allocRunPos(p, glyphCount, NULL);
+        run = &builder.allocRunPos(p, glyphCount, nullptr);
         memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
         for (int i = 0; i < glyphCount; ++i) {
             run->pos[i * 2] = p.getTextSize() * i * .75f;