[Ash] Always show minimize button.

ash/wm/panels/panel_frame_view.cc

 // Copyright (c) 2012 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.
 
 #include "ash/wm/panels/panel_frame_view.h"
 
 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/frame/default_header_painter.h"
 #include "ash/frame/frame_border_hit_test_controller.h"
 #include "ui/base/hit_test.h"
@@ skipping 21 matching lines @@
 PanelFrameView::~PanelFrameView() {
 }
 
 const char* PanelFrameView::GetClassName() const {
   return kViewClassName;
 }
 
 void PanelFrameView::InitHeaderPainter() {
   header_painter_.reset(new DefaultHeaderPainter);
 
-  caption_button_container_ = new FrameCaptionButtonContainerView(frame_,
-      FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
+  caption_button_container_ = new FrameCaptionButtonContainerView(frame_);
   AddChildView(caption_button_container_);
 
   header_painter_->Init(frame_, this, caption_button_container_);
 
   if (frame_->widget_delegate()->ShouldShowWindowIcon()) {
     window_icon_ = new views::ImageView();
     AddChildView(window_icon_);
     header_painter_->UpdateLeftHeaderView(window_icon_);
   }
 }
@@ skipping 71 matching lines @@
 }
 
 gfx::Rect PanelFrameView::GetWindowBoundsForClientBounds(
     const gfx::Rect& client_bounds) const {
   gfx::Rect window_bounds = client_bounds;
   window_bounds.Inset(0, -NonClientTopBorderHeight(), 0, 0);
   return window_bounds;
 }
 
 }  // namespace ash