[sync] Componentize sync: Part 6: Add more SYNC_EXPORTs to files in src/sync/

sync/syncable/directory_backing_store.cc

Index: sync/syncable/directory_backing_store.cc
diff --git a/sync/syncable/directory_backing_store.cc b/sync/syncable/directory_backing_store.cc
index a6095279c86a37dd3aa0ccaee513f458c5d410bf..ea51b57d7700477f0339b012fc6f5d26d0848deb 100644
--- a/sync/syncable/directory_backing_store.cc
+++ b/sync/syncable/directory_backing_store.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 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.
 
@@ -22,6 +22,7 @@
 #include "sql/connection.h"
 #include "sql/statement.h"
 #include "sql/transaction.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/node_ordinal.h"
 #include "sync/protocol/bookmark_specifics.pb.h"
 #include "sync/protocol/sync.pb.h"
@@ -38,8 +39,10 @@ namespace syncable {
 // modifies all the columns in the entry table.
 static const string::size_type kUpdateStatementBufferSize = 2048;
 
+// Global visibility for our unittest.
+SYNC_EXPORT_PRIVATE extern const int32 kCurrentDBVersion;

[rlarocque, 2012/12/22 02:00:49]

There should be no need for extern declarations in .cc files.  Could we just
remove this line?

[Raghu Simha, 2012/12/22 02:25:02]

Done.

+
 // Increment this version whenever updating DB tables.
-extern const int32 kCurrentDBVersion;  // Global visibility for our unittest.
 const int32 kCurrentDBVersion = 85;
 
 // Iterate over the fields of |entry| and bind each to |statement| for