Switch to standard integer types in sync/.

sync/api/attachments/attachment_metadata.h

 // 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.
 
 #ifndef SYNC_API_ATTACHMENTS_ATTACHMENT_METADATA_H_
 #define SYNC_API_ATTACHMENTS_ATTACHMENT_METADATA_H_
 
+#include <stddef.h>
+
 #include <vector>
 
-#include "base/basictypes.h"
 #include "sync/api/attachments/attachment_id.h"
 #include "sync/base/sync_export.h"
 
 namespace syncer {
 
 // This class represents immutable Attachment metadata.
 //
 // It is OK to copy and return AttachmentMetadata by value.
 class SYNC_EXPORT AttachmentMetadata {
  public:
@@ skipping 14 matching lines @@
   // AttachmentMetadata may not be necessary (crbug/465375).
   AttachmentId id_;
   size_t size_;
 };
 
 typedef std::vector<syncer::AttachmentMetadata> AttachmentMetadataList;
 
 }  // namespace syncer
 
 #endif  // SYNC_API_ATTACHMENTS_ATTACHMENT_METADATA_H_