Extract NativeAppWindow from src/extensions

components/native_app_window/native_app_window_export.h

Index: components/native_app_window/native_app_window_export.h
diff --git a/components/native_app_window/native_app_window_export.h b/components/native_app_window/native_app_window_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..9edca1ce7573fa82fc72b04b94d38dca4a3e3e71
--- /dev/null
+++ b/components/native_app_window/native_app_window_export.h
@@ -0,0 +1,45 @@
+// Copyright 2014 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_NATIVE_APP_WINDOW_NATIVE_APP_WINDOW_EXPORT_H_
+#define COMPONENTS_NATIVE_APP_WINDOW_NATIVE_APP_WINDOW_EXPORT_H_
+
+// TODO(tapted): Enable this.
+#if 0 && defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(NATIVE_APP_WINDOW_IMPLEMENTATION)
+#define NATIVE_APP_WINDOW_EXPORT __declspec(dllexport)
+#else
+#define NATIVE_APP_WINDOW_EXPORT __declspec(dllimport)
+#endif  // defined(NATIVE_APP_WINDOW_IMPLEMENTATION)
+
+#if defined(NATIVE_APP_WINDOW_VIEWS_IMPLEMENTATION)
+#define NATIVE_APP_WINDOW_VIEWS_EXPORT __declspec(dllexport)
+#else
+#define NATIVE_APP_WINDOW_VIEWS_EXPORT __declspec(dllimport)
+#endif  // defined(NATIVE_APP_WINDOW_VIEWS_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+
+#if defined(NATIVE_APP_WINDOW_IMPLEMENTATION)
+#define NATIVE_APP_WINDOW_EXPORT __attribute__((visibility("default")))
+#else
+#define NATIVE_APP_WINDOW_EXPORT
+#endif
+
+#if defined(NATIVE_APP_WINDOW_VIEWS_IMPLEMENTATION)
+#define NATIVE_APP_WINDOW_VIEWS_EXPORT __attribute__((visibility("default")))
+#else
+#define NATIVE_APP_WINDOW_VIEWS_EXPORT
+#endif
+
+#endif  // defined(WIN32)
+
+#else  // defined(COMPONENT_BUILD)
+#define NATIVE_APP_WINDOW_EXPORT
+#define NATIVE_APP_WINDOW_VIEWS_EXPORT
+#endif
+
+#endif  // COMPONENTS_NATIVE_APP_WINDOW_NATIVE_APP_WINDOW_EXPORT_H_