Remove win aura theme references

chrome/browser/ui/libgtk2ui/gtk2_ui.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 "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
 
 #include <math.h>
 #include <pango/pango.h>
 #include <set>
 #include <utility>
@@ skipping 1083 matching lines @@
   switch (id) {
     case IDR_THEME_TOOLBAR: {
       SkBitmap bitmap;
       bitmap.allocN32Pixels(kToolbarImageWidth, kToolbarImageHeight);
       bitmap.eraseColor(
           NativeThemeGtk2::instance()->GetSystemColor(
               ui::NativeTheme::kColorId_LabelBackgroundColor));
       return bitmap;
     }
 
-    // TODO(erg): We list both the normal and *_DESKTOP versions of these
-    // images because in some contexts, we don't go through the
-    // chrome::MapThemeImage interface. That should be fixed, but tracking that
-    // down is Hard.
     case IDR_THEME_TAB_BACKGROUND:
-    case IDR_THEME_TAB_BACKGROUND_DESKTOP:
       return GenerateTabImage(IDR_THEME_FRAME);
     case IDR_THEME_TAB_BACKGROUND_INCOGNITO:
-    case IDR_THEME_TAB_BACKGROUND_INCOGNITO_DESKTOP:
       return GenerateTabImage(IDR_THEME_FRAME_INCOGNITO);
     case IDR_FRAME:
     case IDR_THEME_FRAME:
       return GenerateFrameImage(ThemeProperties::COLOR_FRAME,
                                 "frame-gradient-color");
     case IDR_FRAME_INACTIVE:
     case IDR_THEME_FRAME_INACTIVE:
       return GenerateFrameImage(ThemeProperties::COLOR_FRAME_INACTIVE,
                                 "inactive-frame-gradient-color");
     case IDR_THEME_FRAME_INCOGNITO:
@@ skipping 241 matching lines @@
   // Blacklist scaling factors <130% (crbug.com/484400) and round
   // to 1 decimal to prevent rendering problems (crbug.com/485183).
   return scale < 1.3f ? 1.0f : roundf(scale * 10) / 10;
 }
 
 }  // namespace libgtk2ui
 
 views::LinuxUI* BuildGtk2UI() {
   return new libgtk2ui::Gtk2UI;
 }