Do not use assets for Ash window control button backgrounds

chrome/browser/ui/layout_constants.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_UI_LAYOUT_CONSTANTS_H_
 #define CHROME_BROWSER_UI_LAYOUT_CONSTANTS_H_
 
 #include "ui/gfx/geometry/insets.h"
 
 enum LayoutConstant {
+  // The height of a button in in a maximized Ash browser window.
+  ASH_BROWSER_MAXIMIZED_HEADER_BUTTON_HEIGHT,

[tdanderson, 2015/12/17 18:00:54]

Peter, is it appropriate to put these here since they are Ash-specific?

[Peter Kasting, 2015/12/17 20:56:08]

Covered in my other reply.

[tdanderson, 2015/12/18 17:42:53]

Acknowledged.

+
+  // The width of a button in in a maximized Ash browser window.
+  ASH_BROWSER_MAXIMIZED_HEADER_BUTTON_WIDTH,
+
+  // The height of a button in in a restored Ash browser window.
+  ASH_BROWSER_RESTORED_HEADER_BUTTON_HEIGHT,
+
+  // The width of a button in in a restored Ash browser window.
+  ASH_BROWSER_RESTORED_HEADER_BUTTON_WIDTH,
+
   // Vertical offset from top of content to the top of find bar.
   FIND_BAR_TOOLBAR_OVERLAP,
 
   // Horizontal padding applied between items of icon-label views.
   ICON_LABEL_VIEW_INTERNAL_PADDING,
 
   // Additional horizontal padding applied on the trailing edge of icon-label
   // views.
   ICON_LABEL_VIEW_TRAILING_PADDING,
 
@@ skipping 100 matching lines @@
   TOOLBAR,
 
   // The spacing between a ToolbarButton's image and its border.
   TOOLBAR_BUTTON,
 };
 
 int GetLayoutConstant(LayoutConstant constant);
 gfx::Insets GetLayoutInsets(LayoutInset inset);
 
 #endif  // CHROME_BROWSER_UI_LAYOUT_CONSTANTS_H_