[Sync] Convert sync to a static library.

components/sync/js/js_event_details.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_JS_JS_EVENT_DETAILS_H_
 #define COMPONENTS_SYNC_JS_JS_EVENT_DETAILS_H_
 
 // See README.js for design comments.
 
 #include <string>
 
 #include "base/values.h"
 #include "components/sync/base/immutable.h"
-#include "components/sync/base/sync_export.h"
 
 namespace syncer {
 
 // A thin wrapper around Immutable<DictionaryValue>.  Used for passing
 // around event details to different threads.
-class SYNC_EXPORT JsEventDetails {
+class JsEventDetails {
  public:
   // Uses an empty dictionary.
   JsEventDetails();
 
   // Takes over the data in |details|, leaving |details| empty.
   explicit JsEventDetails(base::DictionaryValue* details);
 
   JsEventDetails(const JsEventDetails& other);
 
   ~JsEventDetails();
 
   const base::DictionaryValue& Get() const;
 
   std::string ToString() const;
 
   // Copy constructor and assignment operator welcome.
 
  private:
   typedef Immutable<base::DictionaryValue,
                     HasSwapMemFnByPtr<base::DictionaryValue>>
       ImmutableDictionaryValue;
 
   ImmutableDictionaryValue details_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_JS_JS_EVENT_DETAILS_H_