Style Change: NULL->nullptr

src/utils/win/SkHRESULT.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 
 #include "SkHRESULT.h"
 
 void SkTraceHR(const char* file, unsigned long line, HRESULT hr, const char* msg) {
     if (msg) {
         SkDebugf("%s\n", msg);
     }
     SkDebugf("%s(%lu) : error 0x%x: ", file, line, hr);
 
-    LPSTR errorText = NULL;
+    LPSTR errorText = nullptr;
     FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                    FORMAT_MESSAGE_FROM_SYSTEM |
                    FORMAT_MESSAGE_IGNORE_INSERTS,
-                   NULL,
+                   nullptr,
                    hr,
                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                    (LPSTR) &errorText,
                    0,
-                   NULL
+                   nullptr
     );
 
-    if (NULL == errorText) {
+    if (nullptr == errorText) {
         SkDebugf("<unknown>\n");
     } else {
         SkDebugf("%s", errorText);
         LocalFree(errorText);
-        errorText = NULL;
+        errorText = nullptr;
     }
 }