Get rid of some lingering MD-specific raster assets.

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 1150 matching lines @@
     case IDR_OMNIBOX_TTS: {
       return GenerateTintedIcon(id, entry_tint_);
     }
 
     // TODO(erg): The dropdown arrow should be tinted because we're injecting
     // various background GTK colors, but the code that accesses them needs to
     // be modified so that they ask their ui::ThemeProvider instead of the
     // ResourceBundle. (i.e. in a light on dark theme, the dropdown arrow will
     // be dark on dark)
     case IDR_MENU_DROPARROW:
-    case IDR_BROWSER_ACTIONS_OVERFLOW:
       return GenerateTintedIcon(id, button_tint_);
   }
 
   return SkBitmap();
 }
 
 SkBitmap Gtk2UI::GenerateFrameImage(
     int color_id,
     const char* gradient_name) const {
 #if GTK_MAJOR_VERSION == 2
@@ skipping 208 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;
 }