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

sync/internal_api/sync_encryption_handler_impl.h

Index: sync/internal_api/sync_encryption_handler_impl.h
diff --git a/sync/internal_api/sync_encryption_handler_impl.h b/sync/internal_api/sync_encryption_handler_impl.h
index a3085031af1cd4272e67a667c84caade05172002..f3a790952c93cc615c0634219b5b3d763dccabda 100644
--- a/sync/internal_api/sync_encryption_handler_impl.h
+++ b/sync/internal_api/sync_encryption_handler_impl.h
@@ -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.
 
@@ -14,6 +14,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/sync_encryption_handler.h"
 #include "sync/syncable/nigori_handler.h"
 #include "sync/util/cryptographer.h"
@@ -41,7 +42,7 @@ class WriteTransaction;
 // sync methods.
 // All methods are non-thread-safe and should only be called from the sync
 // thread unless explicitly noted otherwise.
-class SyncEncryptionHandlerImpl
+class SYNC_EXPORT_PRIVATE SyncEncryptionHandlerImpl
     : public SyncEncryptionHandler,
       public syncable::NigoriHandler {
  public: