Remove native_stack accessor from StackedPanelCollection

chrome/browser/ui/panels/stacked_panel_collection.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 "chrome/browser/ui/panels/stacked_panel_collection.h"
 
 #include <algorithm>
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "chrome/browser/ui/panels/detached_panel_collection.h"
@@ skipping 586 matching lines @@
 void StackedPanelCollection::MoveAllDraggingPanelsInstantly(
     const gfx::Vector2d& delta_origin) {
   for (Panels::const_iterator iter = panels_.begin();
        iter != panels_.end(); iter++) {
     Panel* panel = *iter;
     if (panel->in_preview_mode())
       panel->MoveByInstantly(delta_origin);
   }
 }
 
+bool StackedPanelCollection::IsMinimized() const {
+  return native_stack_->IsMinimized();
+}
+
 void StackedPanelCollection::UpdatePanelCornerStyle(Panel* panel) {
   panel::CornerStyle corner_style;
   bool at_top = panel == top_panel();
   bool at_bottom = panel == bottom_panel();
   if (at_top && at_bottom)
     corner_style = panel::ALL_ROUNDED;
   else if (at_top)
     corner_style = panel::TOP_ROUNDED;
   else if (at_bottom)
     corner_style = panel::BOTTOM_ROUNDED;
@@ skipping 44 matching lines @@
     if (panel->IsActive())
       bottom += panel->GetBounds().height();
     else
       bottom += panel::kTitlebarHeight;
   }
   int available_space = work_area.bottom() - bottom;
   if (available_space < 0)
     available_space = 0;
   return available_space;
 }