Style Change: NULL->nullptr

tests/PDFDocumentTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
 
 #include "SkCanvas.h"
 #include "SkDocument.h"
@@ skipping 64 matching lines @@
 
     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(path.c_str()));
 
     SkCanvas* canvas = doc->beginPage(100, 100);
 
     canvas->drawColor(SK_ColorRED);
     doc->endPage();
     doc->close();
 
     FILE* file = fopen(path.c_str(), "r");
-    REPORTER_ASSERT(reporter, file != NULL);
+    REPORTER_ASSERT(reporter, file != nullptr);
     char header[100];
     REPORTER_ASSERT(reporter, fread(header, 4, 1, file) != 0);
     REPORTER_ASSERT(reporter, strncmp(header, "%PDF", 4) == 0);
     fclose(file);
 }
 
 static void test_close(skiatest::Reporter* reporter) {
     SkDynamicMemoryWStream stream;
     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(&stream));
 
     SkCanvas* canvas = doc->beginPage(100, 100);
     canvas->drawColor(SK_ColorRED);
     doc->endPage();
 
     doc->close();
 
     REPORTER_ASSERT(reporter, stream.bytesWritten() != 0);
 }
 
 DEF_TEST(document_tests, reporter) {
     REQUIRE_PDF_DOCUMENT(document_tests, reporter);
     test_empty(reporter);
     test_abort(reporter);
     test_abortWithFile(reporter);
     test_file(reporter);
     test_close(reporter);
 }