Revert of Make WindowState::CanMinimize() take into account WidgetDelegate::CanMinimize()

ash/frame/custom_frame_view_ash.cc

Index: ash/frame/custom_frame_view_ash.cc
diff --git a/ash/frame/custom_frame_view_ash.cc b/ash/frame/custom_frame_view_ash.cc
index 169e8aef9285266ee3f6bc5ceeb65a5e41831ca0..f4422fc796e412210b6de7c1f931a5c06d13b326 100644
--- a/ash/frame/custom_frame_view_ash.cc
+++ b/ash/frame/custom_frame_view_ash.cc
@@ -202,7 +202,12 @@
       avatar_icon_(NULL),
       caption_button_container_(NULL),
       fullscreen_visible_fraction_(0) {
-  caption_button_container_ = new FrameCaptionButtonContainerView(frame_);
+  FrameCaptionButtonContainerView::MinimizeAllowed minimize_allowed =
+      frame_->widget_delegate()->CanMinimize() ?
+          FrameCaptionButtonContainerView::MINIMIZE_ALLOWED :
+          FrameCaptionButtonContainerView::MINIMIZE_DISALLOWED;
+  caption_button_container_ = new FrameCaptionButtonContainerView(frame_,
+      minimize_allowed);
   caption_button_container_->UpdateSizeButtonVisibility();
   AddChildView(caption_button_container_);