[MacViews] Implement size constraints for app windows.

ui/gfx/mac/nswindow_util.h

Index: ui/gfx/mac/nswindow_util.h
diff --git a/ui/gfx/mac/nswindow_util.h b/ui/gfx/mac/nswindow_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..b5618fda4b7388d866bd410b5443783300e6a911
--- /dev/null
+++ b/ui/gfx/mac/nswindow_util.h
@@ -0,0 +1,29 @@
+// 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_UTIL_H_
+#define UI_GFX_MAC_NSWINDOW_UTIL_H_
+
+namespace gfx {
+class Size;
+}
+
+@class NSWindow;
+
+// Set whether the window can be fullscreened.
+void SetFullScreenCollectionBehavior(NSWindow* window, bool allow_fullscreen);

[tapted, 2015/03/30 06:33:37]

can this and SetResizableStyleMask move to the .mm in an anonymous namespace?

(if not, I'd go for names that are closer to the comment, like
SetNSWindowCanFullscreen)

[jackhou1, 2015/03/31 00:50:42]

Done.

+
+// Set whether the window is resizable.
+void SetResizableStyleMask(NSWindow* window, bool resizable);
+
+// 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).
+void ApplySizeConstraints(NSWindow* window,

[tapted, 2015/03/30 06:33:37]

this should be in namespace gfx (missed this before  - sorry)

Also you'll need GFX_EXPORT (this will fix the mac_debug compile error)

And the name... it's maybe OK. But it might also make sense to put `NSWindow` in
the function names so they sound less generic / less likely to collide with
other global functions. E.g. ApplyNSWindowSizeConstraints.

[jackhou1, 2015/03/31 00:50:42]

Done.

+                          const gfx::Size& min_size,
+                          const gfx::Size& max_size,
+                          bool can_resize,
+                          bool can_fullscreen);
+
+#endif  // UI_GFX_MAC_NSWINDOW_UTIL_H_