Revert of Keep track of which attachments are referenced by which sync entries.

sync/internal_api/write_node.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 "sync/internal_api/public/write_node.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "sync/internal_api/public/base_transaction.h"
@@ skipping 446 matching lines @@
       return true;
     }
   }
 
   entry_->PutParentId(new_parent_id);
 
   // Now set the predecessor, which sets IS_UNSYNCED as necessary.
   return PutPredecessor(predecessor);
 }
 
-void WriteNode::SetAttachmentMetadata(
-    const sync_pb::AttachmentMetadata& attachment_metadata) {
-  entry_->PutAttachmentMetadata(attachment_metadata);
-}
-
 const syncable::Entry* WriteNode::GetEntry() const {
   return entry_;
 }
 
 const BaseTransaction* WriteNode::GetTransaction() const {
   return transaction_;
 }
 
 syncable::MutableEntry* WriteNode::GetMutableEntryForTest() {
   return entry_;
@@ skipping 22 matching lines @@
   MarkForSyncing();
 
   return true;
 }
 
 void WriteNode::MarkForSyncing() {
   syncable::MarkForSyncing(entry_);
 }
 
 }  // namespace syncer