Replace kCanMaximize/Minimize/Resize with kResizeBehavior.

ui/views/widget/widget_delegate.h

Index: ui/views/widget/widget_delegate.h
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
index 2ce16e971af520b783113eafbdc5ec42c5c932fd..bd4d8a7a1de290efe33f61084d1640e85e1badd2 100644
--- a/ui/views/widget/widget_delegate.h
+++ b/ui/views/widget/widget_delegate.h
@@ -62,6 +62,9 @@ class VIEWS_EXPORT WidgetDelegate {
   // Returns true if the window can be minimized.
   virtual bool CanMinimize() const;
 
+  // Returns a bitmask of ui::mojom::kResizeBehavior values.
+  virtual int32_t GetResizeBehavior() const;
+
   // Returns true if the window can be activated.
   virtual bool CanActivate() const;