Extract NativeAppWindow from src/extensions

extensions/common/draggable_region.h

Index: extensions/common/draggable_region.h
diff --git a/extensions/common/draggable_region.h b/extensions/common/draggable_region.h
deleted file mode 100644
index 8b22aa332c5800c10bbcfd8d6678b378ac2ed490..0000000000000000000000000000000000000000
--- a/extensions/common/draggable_region.h
+++ /dev/null
@@ -1,21 +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 EXTENSIONS_COMMON_DRAGGABLE_REGION_H_
-#define EXTENSIONS_COMMON_DRAGGABLE_REGION_H_
-
-#include "ui/gfx/rect.h"
-
-namespace extensions {
-
-struct DraggableRegion {
-  bool draggable;
-  gfx::Rect bounds;
-
-  DraggableRegion();
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_COMMON_DRAGGABLE_REGION_H_