Mojo: NULL -> nullptr in mojo/public/cpp/bindings and also for the bindings generator.

mojo/public/cpp/bindings/tests/validation_test_input_parser.cc

 // Copyright 2014 The Chromium 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 "mojo/public/cpp/bindings/tests/validation_test_input_parser.h"
 
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
 
@@ skipping 366 matching lines @@
                                            size_t prefix_length) {
   if (static_cast<size_t>(range.second - range.first) < prefix_length)
     return false;
 
   return memcmp(range.first, prefix, prefix_length) == 0;
 }
 
 bool ValidationTestInputParser::ConvertToUnsignedInteger(
     const std::string& value_string,
     unsigned long long int* value) {
-  const char* format = NULL;
+  const char* format = nullptr;
   if (value_string.find_first_of("xX") != std::string::npos)
     format = "%llx";
   else
     format = "%llu";
   return sscanf(value_string.c_str(), format, value) == 1;
 }
 
 }  // namespace
 
 bool ParseValidationTestInput(const std::string& input,
                               std::vector<uint8_t>* data,
                               size_t* num_handles,
                               std::string* error_message) {
   ValidationTestInputParser parser(input, data, num_handles, error_message);
   return parser.Run();
 }
 
 }  // namespace test
 }  // namespace mojo