[Sync] Convert sync to a static library.

components/sync/base/sync_export.h

Index: components/sync/base/sync_export.h
diff --git a/components/sync/base/sync_export.h b/components/sync/base/sync_export.h
deleted file mode 100644
index 1260e25b1e5422590e75f503e3dbbf76ced88b62..0000000000000000000000000000000000000000
--- a/components/sync/base/sync_export.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright (c) 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_SYNC_EXPORT_H_
-#define COMPONENTS_SYNC_SYNC_EXPORT_H_
-
-#if defined(COMPONENT_BUILD)
-#if defined(WIN32)
-
-// TODO(skym): Remove SYNC_EXPORT_PRIVATE, see crbug/554242.
-
-#if defined(SYNC_IMPLEMENTATION)
-#define SYNC_EXPORT __declspec(dllexport)
-#define SYNC_EXPORT_PRIVATE __declspec(dllexport)
-#elif defined(SYNC_TEST)
-#define SYNC_EXPORT __declspec(dllimport)
-#define SYNC_EXPORT_PRIVATE __declspec(dllimport)
-#else
-#define SYNC_EXPORT __declspec(dllimport)
-#define SYNC_EXPORT_PRIVATE
-#endif  // defined(SYNC_IMPLEMENTATION)
-
-#else  // defined(WIN32)
-#if defined(SYNC_IMPLEMENTATION)
-#define SYNC_EXPORT __attribute__((visibility("default")))
-#define SYNC_EXPORT_PRIVATE __attribute__((visibility("default")))
-#elif defined(SYNC_TEST)
-#define SYNC_EXPORT
-#define SYNC_EXPORT_PRIVATE __attribute__((visibility("default")))
-#else
-#define SYNC_EXPORT
-#define SYNC_EXPORT_PRIVATE
-#endif  // defined(SYNC_IMPLEMENTATION)
-#endif
-
-#else  // defined(COMPONENT_BUILD)
-#define SYNC_EXPORT
-#define SYNC_EXPORT_PRIVATE
-#endif
-
-#endif  // COMPONENTS_SYNC_SYNC_EXPORT_H_