Extract NativeAppWindow from src/extensions

extensions/browser/app_window/size_constraints.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_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_
-#define EXTENSIONS_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_
-
-#include "ui/gfx/geometry/size.h"
-
-namespace gfx {
-class Insets;
-}
-
-namespace extensions {
-
-class SizeConstraints {
- public:
-  // The value SizeConstraints uses to represent an unbounded width or height.
-  // This is an enum so that it can be declared inline here.
-  enum { kUnboundedSize = 0 };
-
-  SizeConstraints();
-  SizeConstraints(const gfx::Size& min_size, const gfx::Size& max_size);
-  ~SizeConstraints();
-
-  // Adds frame insets to a size constraint.
-  static gfx::Size AddFrameToConstraints(const gfx::Size& size_constraints,
-                                         const gfx::Insets& frame_insets);
-
-  // Returns the bounds with its size clamped to the min/max size.
-  gfx::Size ClampSize(gfx::Size size) const;
-
-  // When gfx::Size is used as a min/max size, a zero represents an unbounded
-  // component. This method checks whether either component is specified.
-  // Note we can't use gfx::Size::IsEmpty as it returns true if either width
-  // or height is zero.
-  bool HasMinimumSize() const;
-  bool HasMaximumSize() const;
-
-  // This returns true if all components are specified, and min and max are
-  // equal.
-  bool HasFixedSize() const;
-
-  gfx::Size GetMaximumSize() const;
-  gfx::Size GetMinimumSize() const;
-
-  void set_minimum_size(const gfx::Size& min_size);
-  void set_maximum_size(const gfx::Size& max_size);
-
- private:
-  gfx::Size minimum_size_;
-  gfx::Size maximum_size_;
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_APP_WINDOW_SIZE_CONSTRAINTS_H_