[sync] Componentize sync: Part 2: Add SYNC_EXPORTs to files in src/sync/

sync/internal_api/public/http_post_provider_factory.h

Index: sync/internal_api/public/http_post_provider_factory.h
diff --git a/sync/internal_api/public/http_post_provider_factory.h b/sync/internal_api/public/http_post_provider_factory.h
index dfb87a3f17627c91f058added7dc1ff5d149ac32..e6d6cb097ed7bc59cca5fcf65e94ca1658a62e2e 100644
--- a/sync/internal_api/public/http_post_provider_factory.h
+++ b/sync/internal_api/public/http_post_provider_factory.h
@@ -1,10 +1,12 @@
-// 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.
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_HTTP_POST_PROVIDER_FACTORY_H_
 #define SYNC_INTERNAL_API_PUBLIC_HTTP_POST_PROVIDER_FACTORY_H_
 
+#include "sync/base/sync_export.h"
+
 namespace syncer {
 
 class HttpPostProviderInterface;
@@ -13,7 +15,7 @@ class HttpPostProviderInterface;
 // implementations and dependencies.
 // A factory instance itself should be owned by whomever uses it to create
 // HttpPostProviders.
-class HttpPostProviderFactory {
+class SYNC_EXPORT HttpPostProviderFactory {
  public:
   virtual ~HttpPostProviderFactory() {}