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

sync/notifier/invalidation_state_tracker.h

-// 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.
 //
 // An InvalidationStateTracker is an interface that handles persisting state
 // needed for invalidations. Currently, it is responsible for managing the
 // following information:
 // - Max version seen from the invalidation server to help dedupe invalidations.
 // - Bootstrap data for the invalidation client.
 // - Payloads and locally generated ack handles, to support local acking.
 
 #ifndef SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_
 #define SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "google/cacheinvalidation/include/types.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/invalidation.h"
 #include "sync/notifier/invalidation_util.h"
 
 namespace base {
 class TaskRunner;
 }  // namespace base
 
 namespace syncer {
 
-struct InvalidationState {
+struct SYNC_EXPORT InvalidationState {
   InvalidationState();
   ~InvalidationState();
 
   int64 version;
   std::string payload;
   AckHandle expected;
   AckHandle current;
 };
 
 // TODO(dcheng): Remove this in favor of adding an Equals() method.
@@ skipping 40 matching lines @@
   virtual void Acknowledge(const invalidation::ObjectId& id,
                            const AckHandle& ack_handle) = 0;
 
  protected:
   virtual ~InvalidationStateTracker() {}
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_