[Sync] Convert sync to a static library.

components/sync/core_impl/js_mutation_event_observer.h

 // 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 COMPONENTS_SYNC_CORE_IMPL_JS_MUTATION_EVENT_OBSERVER_H_
 #define COMPONENTS_SYNC_CORE_IMPL_JS_MUTATION_EVENT_OBSERVER_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/base/weak_handle.h"
 #include "components/sync/core/sync_manager.h"
 #include "components/sync/syncable/transaction_observer.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace syncer {
 
 class JsEventDetails;
 class JsEventHandler;
 
 // Observes all change- and transaction-related events and routes a
 // summarized version to a JsEventHandler.
-class SYNC_EXPORT JsMutationEventObserver
-    : public SyncManager::ChangeObserver,
-      public syncable::TransactionObserver,
-      public base::NonThreadSafe {
+class JsMutationEventObserver : public SyncManager::ChangeObserver,
+                                public syncable::TransactionObserver,
+                                public base::NonThreadSafe {
  public:
   JsMutationEventObserver();
 
   ~JsMutationEventObserver() override;
 
   base::WeakPtr<JsMutationEventObserver> AsWeakPtr();
 
   void InvalidateWeakPtrs();
 
   void SetJsEventHandler(const WeakHandle<JsEventHandler>& event_handler);
@@ skipping 17 matching lines @@
                      const JsEventDetails& details);
 
   base::WeakPtrFactory<JsMutationEventObserver> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(JsMutationEventObserver);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_CORE_IMPL_JS_MUTATION_EVENT_OBSERVER_H_