Allow Chrome apps to create Ash Panels (apps v2)

ash/wm/custom_frame_view_ash.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/custom_frame_view_ash.h"
 
 #include "ash/wm/frame_painter.h"
 #include "ash/wm/workspace/frame_maximize_button.h"
 #include "grit/ash_resources.h"
 #include "grit/ui_strings.h"  // Accessibility names
@@ skipping 159 matching lines @@
     ui::LayerAnimator::set_slow_animation_mode(false);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // CustomFrameViewAsh, private:
 
 int CustomFrameViewAsh::NonClientTopBorderHeight() const {
   if (frame_->IsFullscreen())
     return 0;
 
-  // Reserve enough space to see the buttons, including any offset from top and
-  // reserving space for the separator line.
-  return close_button_->bounds().bottom() +
-      frame_painter_->HeaderContentSeparatorSize();
+  return frame_painter_->HeaderHeight();
 }
 
 }  // namespace ash