Consolidate ShouldUseNativeFrame/AlwaysUseNativeFrame/UseNativeFrame spaghetti.

chrome/browser/ui/views/tabs/tab.cc

 // Copyright (c) 2011 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/views/tabs/tab.h"
 
 #include <limits>
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/defaults.h"
@@ skipping 432 matching lines @@
 }
 
 void Tab::PaintInactiveTabBackground(gfx::Canvas* canvas) {
   // The tab image needs to be lined up with the background image
   // so that it feels partially transparent.  These offsets represent the tab
   // position within the frame background image.
   int offset = GetMirroredX() + background_offset_.x();
 
   int tab_id;
   if (GetWidget() &&
-      GetWidget()->GetContainingWindow()->non_client_view()->UseNativeFrame()) {
+      GetWidget()->GetContainingWindow()->ShouldUseNativeFrame()) {
     tab_id = IDR_THEME_TAB_BACKGROUND_V;
   } else {
     tab_id = data().incognito ? IDR_THEME_TAB_BACKGROUND_INCOGNITO :
                                 IDR_THEME_TAB_BACKGROUND;
   }
 
   SkBitmap* tab_bg = GetThemeProvider()->GetBitmapNamed(tab_id);
 
   TabImage* tab_image = &tab_active_;
   TabImage* tab_inactive_image = &tab_inactive_;
@@ skipping 213 matching lines @@
   tab_active_.image_r = rb.GetBitmapNamed(IDR_TAB_ACTIVE_RIGHT);
   tab_active_.l_width = tab_active_.image_l->width();
   tab_active_.r_width = tab_active_.image_r->width();
 
   tab_inactive_.image_l = rb.GetBitmapNamed(IDR_TAB_INACTIVE_LEFT);
   tab_inactive_.image_c = rb.GetBitmapNamed(IDR_TAB_INACTIVE_CENTER);
   tab_inactive_.image_r = rb.GetBitmapNamed(IDR_TAB_INACTIVE_RIGHT);
   tab_inactive_.l_width = tab_inactive_.image_l->width();
   tab_inactive_.r_width = tab_inactive_.image_r->width();
 }