QUIC - (no behavior change) s/NULL/nullptr/g in .../quic/...

net/tools/quic/quic_in_memory_cache_test.cc

 // Copyright 2013 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 <string>
 
 #include "base/files/file_path.h"
 #include "base/memory/singleton.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 46 matching lines @@
     response_headers.SetRequestFirstlineFromStringPieces(version,
                                                          response_code,
                                                          response_detail);
     response_headers.AppendHeader("content-length",
                                   base::IntToString(body.length()));
 
     // Check if response already exists and matches.
     QuicInMemoryCache* cache = QuicInMemoryCache::GetInstance();
     const QuicInMemoryCache::Response* cached_response =
         cache->GetResponse(request_headers);
-    if (cached_response != NULL) {
+    if (cached_response != nullptr) {
       std::string cached_response_headers_str, response_headers_str;
       cached_response->headers().DumpToString(&cached_response_headers_str);
       response_headers.DumpToString(&response_headers_str);
       CHECK_EQ(cached_response_headers_str, response_headers_str);
       CHECK_EQ(cached_response->body(), body);
       return;
     }
     cache->AddResponse(request_headers, response_headers, body);
   }
 };
@@ skipping 51 matching lines @@
   CreateRequest("www.google.com", "/index.html", &request_headers);
 
   const QuicInMemoryCache::Response* response =
       QuicInMemoryCache::GetInstance()->GetResponse(request_headers);
   ASSERT_FALSE(response);
 }
 
 }  // namespace test
 }  // namespace tools
 }  // namespace net