[Sync] Convert sync to a static library.

components/sync/core/non_blocking_sync_common.h

Index: components/sync/core/non_blocking_sync_common.h
diff --git a/components/sync/core/non_blocking_sync_common.h b/components/sync/core/non_blocking_sync_common.h
index 5f3c09c596da0b422cb98254a06fd41c9d965d16..6b8b7920b2540d1a95fadb6f24d7137112f3263a 100644
--- a/components/sync/core/non_blocking_sync_common.h
+++ b/components/sync/core/non_blocking_sync_common.h
@@ -12,14 +12,13 @@
 
 #include "base/time/time.h"
 #include "components/sync/api/entity_data.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/protocol/sync.pb.h"
 
 namespace syncer_v2 {
 
 static const int64_t kUncommittedVersion = -1;
 
-struct SYNC_EXPORT CommitRequestData {
+struct CommitRequestData {
   CommitRequestData();
   CommitRequestData(const CommitRequestData& other);
   ~CommitRequestData();
@@ -34,7 +33,7 @@ struct SYNC_EXPORT CommitRequestData {
   std::string specifics_hash;
 };
 
-struct SYNC_EXPORT CommitResponseData {
+struct CommitResponseData {
   CommitResponseData();
   CommitResponseData(const CommitResponseData& other);
   ~CommitResponseData();
@@ -46,7 +45,7 @@ struct SYNC_EXPORT CommitResponseData {
   std::string specifics_hash;
 };
 
-struct SYNC_EXPORT UpdateResponseData {
+struct UpdateResponseData {
   UpdateResponseData();
   UpdateResponseData(const UpdateResponseData& other);
   ~UpdateResponseData();