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

sync/notifier/non_blocking_invalidator.h

Index: sync/notifier/non_blocking_invalidator.h
diff --git a/sync/notifier/non_blocking_invalidator.h b/sync/notifier/non_blocking_invalidator.h
index 5e27cb0832cff5132910ec21b87be2911a428da1..b2be5d44bebb39a55547640873f68be9bb35be89 100644
--- a/sync/notifier/non_blocking_invalidator.h
+++ b/sync/notifier/non_blocking_invalidator.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.
 //
@@ -15,6 +15,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "jingle/notifier/base/notifier_options.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/util/weak_handle.h"
 #include "sync/notifier/invalidation_handler.h"
 #include "sync/notifier/invalidation_state_tracker.h"
@@ -29,7 +30,7 @@ namespace syncer {
 
 // TODO(akalin): Generalize the interface so it can use any Invalidator.
 // (http://crbug.com/140409).
-class NonBlockingInvalidator
+class SYNC_EXPORT_PRIVATE NonBlockingInvalidator
     : public Invalidator,
       // InvalidationHandler to "observe" our Core via WeakHandle.
       public InvalidationHandler {