[sync] Componentize sync: Part Final: Target 'sync' is now its own component

sync/syncable/syncable_read_transaction.h

Index: sync/syncable/syncable_read_transaction.h
diff --git a/sync/syncable/syncable_read_transaction.h b/sync/syncable/syncable_read_transaction.h
index ecaf59b1b86655ff2a78b489c13c1b909c8befe8..9d60b9722284ae4994f38e242e9db6d727601255 100644
--- a/sync/syncable/syncable_read_transaction.h
+++ b/sync/syncable/syncable_read_transaction.h
@@ -1,10 +1,11 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
+// Copyright 2013 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_SYNCABLE_SYNCABLE_READ_TRANSACTION_H_
 #define SYNC_SYNCABLE_SYNCABLE_READ_TRANSACTION_H_
 
+#include "base/compiler_specific.h"
 #include "sync/base/sync_export.h"
 #include "sync/syncable/syncable_base_transaction.h"
 
@@ -13,7 +14,8 @@ class ReadTransaction;
 namespace syncable {
 
 // Locks db in constructor, unlocks in destructor.
-class SYNC_EXPORT_PRIVATE ReadTransaction : public BaseTransaction {
+class SYNC_EXPORT_PRIVATE ReadTransaction
+    : public NON_EXPORTED_BASE(BaseTransaction) {
  public:
   ReadTransaction(const tracked_objects::Location& from_here,
                   Directory* directory);