[Sync] Convert sync to a static library.

components/sync/api/sync_change_processor.h

Index: components/sync/api/sync_change_processor.h
diff --git a/components/sync/api/sync_change_processor.h b/components/sync/api/sync_change_processor.h
index c0cba4251b224e5df63c5cb86ac2f0ead8062014..d5884a258d6aad37742e7ae15339159b055f6205 100644
--- a/components/sync/api/sync_change_processor.h
+++ b/components/sync/api/sync_change_processor.h
@@ -11,7 +11,6 @@
 #include "components/sync/api/sync_data.h"
 #include "components/sync/api/sync_error.h"
 #include "components/sync/base/model_type.h"
-#include "components/sync/base/sync_export.h"
 
 namespace tracked_objects {
 class Location;
@@ -24,7 +23,7 @@ class SyncChange;
 typedef std::vector<SyncChange> SyncChangeList;
 
 // An interface for services that handle receiving SyncChanges.
-class SYNC_EXPORT SyncChangeProcessor {
+class SyncChangeProcessor {
  public:
   // Whether a context change should force a datatype refresh or not.
   enum ContextRefreshStatus { NO_REFRESH, REFRESH_NEEDED };