refactor: rename the atom directory to shell

shell/browser/ui/cocoa/atom_native_widget_mac.h

@@ -0,0 +1,35 @@
+// Copyright (c) 2018 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_UI_COCOA_ATOM_NATIVE_WIDGET_MAC_H_
+#define ATOM_BROWSER_UI_COCOA_ATOM_NATIVE_WIDGET_MAC_H_
+
+#include "ui/views/widget/native_widget_mac.h"
+
+namespace atom {
+
+class NativeWindowMac;
+
+class AtomNativeWidgetMac : public views::NativeWidgetMac {
+ public:
+  AtomNativeWidgetMac(NativeWindowMac* shell,
+                      NSUInteger style_mask,
+                      views::internal::NativeWidgetDelegate* delegate);
+  ~AtomNativeWidgetMac() override;
+
+ protected:
+  // NativeWidgetMac:
+  NativeWidgetMacNSWindow* CreateNSWindow(
+      const remote_cocoa::mojom::CreateWindowParams* params) override;
+
+ private:
+  NativeWindowMac* shell_;
+  NSUInteger style_mask_;
+
+  DISALLOW_COPY_AND_ASSIGN(AtomNativeWidgetMac);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_UI_COCOA_ATOM_NATIVE_WIDGET_MAC_H_