Add GetMinimumSize() for Borders, and make LabelButton auto-size to at least as

ash/system/tray/tray_details_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/system/tray/tray_details_view.h"
 
 #include "ash/system/tray/fixed_sized_scroll_view.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ui/gfx/canvas.h"
@@ skipping 35 matching lines @@
     if (!visible_)
       return;
     canvas->FillRect(gfx::Rect(0, view.height() - 1, view.width(), 1),
                      kBorderLightColor);
   }
 
   virtual gfx::Insets GetInsets() const OVERRIDE {
     return gfx::Insets(0, 0, 1, 0);
   }
 
+  virtual gfx::Size GetMinimumSize() const OVERRIDE {
+    return gfx::Size(0, 1);
+  }
+
   bool visible_;
 
   DISALLOW_COPY_AND_ASSIGN(ScrollBorder);
 };
 
 TrayDetailsView::TrayDetailsView(SystemTrayItem* owner)
     : owner_(owner),
       footer_(NULL),
       scroller_(NULL),
       scroll_content_(NULL),
@@ skipping 74 matching lines @@
       scroll_border_->set_visible(true);
     else
       scroll_border_->set_visible(false);
   }
 
   views::View::OnPaintBorder(canvas);
 }
 
 }  // namespace internal
 }  // namespace ash