Add dcheck to make sure the maximizable window does not have maximum size

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index df9ace0b9dda84a48100fd8b34e4ef4983346bd0..1f0d60db4e9bf570dfd7b62a55a54018b4fb4281 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -696,6 +696,10 @@ gfx::Size NativeWidgetAura::GetMinimumSize() const {
 }
 
 gfx::Size NativeWidgetAura::GetMaximumSize() const {
+  // If a window have a maximum size, the window should not be
+  // maximizable.
+  DCHECK(delegate_->GetMaximumSize().IsEmpty() ||
+         !window_->GetProperty(aura::client::kCanMaximizeKey));
   return delegate_->GetMaximumSize();
 }