[Sync] Removing duplicate includes, part 2.

components/sync/api/attachments/attachment_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/api/attachments/attachment.h"
 
-#include <stdint.h>
-
 #include <string>
 
-#include "base/memory/ref_counted.h"
-#include "base/memory/ref_counted_memory.h"
 #include "components/sync/core/attachments/attachment_util.h"
 #include "components/sync/protocol/sync.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 namespace {
 
 const char kAttachmentData[] = "some data";
 
@@ skipping 20 matching lines @@
   scoped_refptr<base::RefCountedString> some_data(new base::RefCountedString);
   some_data->data() = kAttachmentData;
   uint32_t crc32c = ComputeCrc32c(some_data);
   AttachmentId id = AttachmentId::Create(some_data->size(), crc32c);
   Attachment a = Attachment::CreateFromParts(id, some_data);
   EXPECT_EQ(id, a.GetId());
   EXPECT_EQ(some_data, a.GetData());
 }
 
 }  // namespace syncer