[Sync] Replacing NULL with nullptr/null throughout sync code.

chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc

 // Copyright (c) 2012 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 <utility>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
@@ skipping 116 matching lines @@
   //        -> Wired News (www.wired.com)
   //        -> tier2_b
   //          -> tier1_b_url0
   //          -> tier3_b
   //            -> Toronto Maple Leafs (mapleleafs.nhl.com)
   //            -> Wynn (www.wynnlasvegas.com)
   //      -> tier1_a_url0
   const BookmarkNode* bar = GetBookmarkBarNode(kSingleProfileIndex);
   const BookmarkNode* cnn = AddURL(
       kSingleProfileIndex, bar, 0, "CNN", GURL("http://www.cnn.com"));
-  ASSERT_TRUE(cnn != NULL);
+  ASSERT_TRUE(cnn != nullptr);
   Move(kSingleProfileIndex, tier1_a, bar, 1);
 
   // Wait for the bookmark position change to sync.
   ASSERT_TRUE(
       UpdatedProgressMarkerChecker(GetSyncService(kSingleProfileIndex)).Wait());
   ASSERT_TRUE(ModelMatchesVerifier(kSingleProfileIndex));
 
   const BookmarkNode* porsche = AddURL(
       kSingleProfileIndex, bar, 2, "Porsche", GURL("http://www.porsche.com"));
   // Rearrange stuff in tier1_a.
   ASSERT_EQ(tier1_a, tier1_a_url2->parent());
   ASSERT_EQ(tier1_a, tier1_a_url1->parent());
   Move(kSingleProfileIndex, tier1_a_url2, tier1_a, 0);
   Move(kSingleProfileIndex, tier1_a_url1, tier1_a, 2);
 
   // Wait for the rearranged hierarchy to sync.
   ASSERT_TRUE(
       UpdatedProgressMarkerChecker(GetSyncService(kSingleProfileIndex)).Wait());
   ASSERT_TRUE(ModelMatchesVerifier(kSingleProfileIndex));
 
   ASSERT_EQ(1, tier1_a_url0->parent()->GetIndexOf(tier1_a_url0));
   Move(kSingleProfileIndex, tier1_a_url0, bar, bar->child_count());
   const BookmarkNode* boa = AddURL(
       kSingleProfileIndex, bar, bar->child_count(),
       "Bank of America", GURL("https://www.bankofamerica.com"));
-  ASSERT_TRUE(boa != NULL);
+  ASSERT_TRUE(boa != nullptr);
   Move(kSingleProfileIndex, tier1_a_url0, top, top->child_count());
   const BookmarkNode* bubble = AddURL(
       kSingleProfileIndex, bar, bar->child_count(), "Seattle Bubble",
           GURL("http://seattlebubble.com"));
-  ASSERT_TRUE(bubble != NULL);
+  ASSERT_TRUE(bubble != nullptr);
   const BookmarkNode* wired = AddURL(
       kSingleProfileIndex, bar, 2, "Wired News", GURL("http://www.wired.com"));
   const BookmarkNode* tier2_b = AddFolder(
       kSingleProfileIndex, tier1_b, 0, "tier2_b");
   Move(kSingleProfileIndex, tier1_b_url0, tier2_b, 0);
   Move(kSingleProfileIndex, porsche, bar, 0);
   SetTitle(kSingleProfileIndex, wired, "News Wired");
   SetTitle(kSingleProfileIndex, porsche, "ICanHazPorsche?");
 
   // Wait for the title change to sync.
@@ skipping 232 matching lines @@
   ASSERT_EQ(0, CountFoldersWithTitlesMatching(kSingleProfileIndex, title));
 
   ASSERT_TRUE(SetupSync());
 
   ASSERT_EQ(1, CountFoldersWithTitlesMatching(kSingleProfileIndex, title));
 }
 
 IN_PROC_BROWSER_TEST_F(SingleClientBookmarksSyncTest, E2E_ONLY(SanitySetup)) {
   ASSERT_TRUE(SetupSync()) <<  "SetupSync() failed.";
 }