Get rid of NULLs in fpdfsdk/

fpdfsdk/fpdfview_embeddertest.cpp

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits>
 #include <string>
 
 #include "fpdfsdk/fpdfview_c_api_test.h"
 #include "public/fpdfview.h"
 #include "testing/embedder_test.h"
@@ skipping 162 matching lines @@
   buffer_size = sizeof(fixed_buffer);
   dest = FPDF_GetNamedDest(document(), -1, fixed_buffer, &buffer_size);
   EXPECT_EQ(nullptr, dest);
   EXPECT_EQ(sizeof(fixed_buffer),
             static_cast<size_t>(buffer_size));  // unmodified.
 }
 
 TEST_F(FPDFViewEmbeddertest, NamedDestsByName) {
   EXPECT_TRUE(OpenDocument("named_dests.pdf"));
 
-  // Null pointer returns NULL.
+  // Null pointer returns nullptr.
   FPDF_DEST dest = FPDF_GetNamedDestByName(document(), nullptr);
   EXPECT_EQ(nullptr, dest);
 
-  // Empty string returns NULL.
+  // Empty string returns nullptr.
   dest = FPDF_GetNamedDestByName(document(), "");
   EXPECT_EQ(nullptr, dest);
 
   // Item from Dests NameTree.
   dest = FPDF_GetNamedDestByName(document(), "First");
   EXPECT_NE(nullptr, dest);
 
   long ignore_len = 0;
   FPDF_DEST dest_by_index =
       FPDF_GetNamedDest(document(), 0, nullptr, &ignore_len);
@@ skipping 75 matching lines @@
 
 // The test should pass when there is no infinite recursion in
 // CPDF_SyntaxParser::GetString().
 TEST_F(FPDFViewEmbeddertest, Hang_355) {
   EXPECT_FALSE(OpenDocument("bug_355.pdf"));
 }
 // The test should pass even when the file has circular references to pages.
 TEST_F(FPDFViewEmbeddertest, Hang_360) {
   EXPECT_FALSE(OpenDocument("bug_360.pdf"));
 }