[Sync] Replacing NULL with nullptr in code and null in comments for components/sync/

components/sync/model_impl/attachments/attachment_service_impl_unittest.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 "components/sync/model_impl/attachments/attachment_service_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 409 matching lines @@
   EXPECT_TRUE(last_download_attachments().find(attachment_ids[2]) ==
               last_download_attachments().end());
   EXPECT_TRUE(last_download_attachments().find(attachment_ids[3]) ==
               last_download_attachments().end());
 }
 
 TEST_F(AttachmentServiceImplTest, GetOrDownload_NoDownloader) {
   // No downloader.
   InitializeAttachmentService(
       base::WrapUnique<MockAttachmentUploader>(new MockAttachmentUploader()),
-      base::WrapUnique<MockAttachmentDownloader>(NULL), this);
+      base::WrapUnique<MockAttachmentDownloader>(nullptr), this);
 
   AttachmentIdList attachment_ids;
   attachment_ids.push_back(AttachmentId::Create(0, 0));
   attachment_service()->GetOrDownloadAttachments(attachment_ids,
                                                  download_callback());
   RunLoop();
   EXPECT_FALSE(store()->read_ids.empty());
 
   AttachmentIdSet local_attachments;
   store()->RespondToRead(local_attachments);
@@ skipping 33 matching lines @@
   for (auto iter = attachment_ids.begin(); iter != attachment_ids.end();
        ++iter) {
     EXPECT_THAT(on_attachment_uploaded_list(), testing::Contains(*iter));
   }
   EXPECT_EQ(num_attachments, store()->drop_ids.size());
 }
 
 TEST_F(AttachmentServiceImplTest, UploadAttachments_Success_NoDelegate) {
   InitializeAttachmentService(base::MakeUnique<MockAttachmentUploader>(),
                               base::MakeUnique<MockAttachmentDownloader>(),
-                              NULL);  // No delegate.
+                              nullptr);  // No delegate.
 
   AttachmentIdList attachment_ids;
   attachment_ids.push_back(AttachmentId::Create(0, 0));
   attachment_service()->UploadAttachments(attachment_ids);
   RunLoopAndFireTimer();
   ASSERT_EQ(1U, store()->read_ids.size());
   ASSERT_EQ(0U, uploader()->upload_requests.size());
   store()->RespondToRead(AttachmentIdSetFromList(attachment_ids));
   RunLoop();
   ASSERT_EQ(0U, store()->read_ids.size());
@@ skipping 47 matching lines @@
   RunLoop();
 
   // Nothing uploaded.
   EXPECT_EQ(0U, uploader()->upload_requests.size());
   // See that the delegate was never called.
   ASSERT_EQ(0U, on_attachment_uploaded_list().size());
   EXPECT_EQ(num_attachments, store()->drop_ids.size());
 }
 
 TEST_F(AttachmentServiceImplTest, UploadAttachments_NoUploader) {
-  InitializeAttachmentService(base::WrapUnique<MockAttachmentUploader>(NULL),
+  InitializeAttachmentService(base::WrapUnique<MockAttachmentUploader>(nullptr),
                               base::MakeUnique<MockAttachmentDownloader>(),
                               this);
 
   AttachmentIdList attachment_ids;
   attachment_ids.push_back(AttachmentId::Create(0, 0));
   attachment_service()->UploadAttachments(attachment_ids);
   RunLoop();
   EXPECT_EQ(0U, store()->read_ids.size());
   ASSERT_EQ(0U, on_attachment_uploaded_list().size());
   EXPECT_EQ(0U, store()->drop_ids.size());
@@ skipping 65 matching lines @@
   net::NetworkChangeNotifier::NotifyObserversOfNetworkChangeForTests(
       net::NetworkChangeNotifier::CONNECTION_WIFI);
   RunLoop();
 
   // No longer in backoff.
   ASSERT_TRUE(mock_timer()->IsRunning());
   ASSERT_EQ(base::TimeDelta(), mock_timer()->GetCurrentDelay());
 }
 
 }  // namespace syncer