Refactor ShellDesktopController and ShellNativeAppWindow to allow for non-aura implementations.

extensions/shell/browser/shell_native_app_window_aura.h

+// 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 EXTENSIONS_SHELL_BROWSER_SHELL_NATIVE_APP_WINDOW_AURA_H_
+#define EXTENSIONS_SHELL_BROWSER_SHELL_NATIVE_APP_WINDOW_AURA_H_
+
+#include "base/macros.h"
+#include "extensions/shell/browser/shell_native_app_window.h"
+
+namespace extensions {
+
+// The Aura-specific parts of the app_shell NativeAppWindow implementation.
+class ShellNativeAppWindowAura : public ShellNativeAppWindow {
+ public:
+  ShellNativeAppWindowAura(extensions::AppWindow* app_window,
+                           const AppWindow::CreateParams& params);
+  ~ShellNativeAppWindowAura() override;
+
+  // ui::BaseWindow:
+  bool IsActive() const override;
+  gfx::NativeWindow GetNativeWindow() const override;
+  gfx::Rect GetBounds() const override;
+  void Show() override;
+  void Hide() override;
+  void Activate() override;
+  void Deactivate() override;
+  void SetBounds(const gfx::Rect& bounds) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ShellNativeAppWindowAura);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_SHELL_BROWSER_SHELL_NATIVE_APP_WINDOW_AURA_H_