Factor out the layout code from OpaqueBrowserFrameView for testing.

chrome/browser/ui/view_ids.h

 // 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.
 
 // This defines an enumeration of IDs that can uniquely identify a view within
 // the scope of a container view.
 
 #ifndef CHROME_BROWSER_UI_VIEW_IDS_H_
 #define CHROME_BROWSER_UI_VIEW_IDS_H_
 
 enum ViewID {
   VIEW_ID_NONE = 0,
 
   // BROWSER WINDOW VIEWS
   // ------------------------------------------------------
 
+  // Views which make up the skyline.

[sky, 2013/08/30 16:35:18]

Document these are views only.

+  VIEW_ID_MINIMIZE_BUTTON,
+  VIEW_ID_MAXIMIZE_BUTTON,
+  VIEW_ID_RESTORE_BUTTON,
+  VIEW_ID_CLOSE_BUTTON,
+  VIEW_ID_WINDOW_ICON,
+  VIEW_ID_WINDOW_TITLE,
+  VIEW_ID_AVATAR_LABEL,
+  VIEW_ID_AVATAR_BUTTON,
+
   // Tabs within a window/tab strip, counting from the left.
   VIEW_ID_TAB_0,
   VIEW_ID_TAB_1,
   VIEW_ID_TAB_2,
   VIEW_ID_TAB_3,
   VIEW_ID_TAB_4,
   VIEW_ID_TAB_5,
   VIEW_ID_TAB_6,
   VIEW_ID_TAB_7,
   VIEW_ID_TAB_8,
@@ skipping 55 matching lines @@
   // Used in chrome/browser/ui/gtk/view_id_util_browsertest.cc
   // If you add new ids, make sure the above test passes.
   VIEW_ID_PREDEFINED_COUNT,
 
   // Plus button on location bar.
   VIEW_ID_ACTION_BOX_BUTTON,
 };
 
 #endif  // CHROME_BROWSER_UI_VIEW_IDS_H_