[MacViews] Implement size constraints for app windows.

ui/gfx/mac/nswindow_frame_controls.h

+// Copyright 2015 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 UI_GFX_MAC_NSWINDOW_FRAME_CONTROLS_H_
+#define UI_GFX_MAC_NSWINDOW_FRAME_CONTROLS_H_
+
+#include "ui/gfx/gfx_export.h"
+
+@class NSWindow;
+
+namespace gfx {
+
+class Size;
+
+// Set whether the window can be fullscreened.
+GFX_EXPORT void SetNSWindowCanFullscreen(NSWindow* window,
+                                         bool allow_fullscreen);
+
+// Sets the min/max size of the window as well as showing/hiding resize,
+// maximize, and fullscreen controls.
+// Sizes refer to the content size (inner bounds).
+GFX_EXPORT void ApplyNSWindowSizeConstraints(NSWindow* window,
+                                             const gfx::Size& min_size,
+                                             const gfx::Size& max_size,
+                                             bool can_resize,
+                                             bool can_fullscreen);
+
+}  // namespace gfx
+
+#endif  // UI_GFX_MAC_NSWINDOW_FRAME_CONTROLS_H_