use the right NativeTheme on bubbles + dialogs on Aura Linux

chrome/browser/ui/views/toolbar/toolbar_view.cc

 // Copyright 2013 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/toolbar/toolbar_view.h"
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/i18n/number_formatting.h"
 #include "base/prefs/pref_service.h"
@@ skipping 394 matching lines @@
 // ToolbarView, views::MenuButtonListener implementation:
 
 void ToolbarView::OnMenuButtonClicked(views::View* source,
                                       const gfx::Point& point) {
   TRACE_EVENT0("views", "ToolbarView::OnMenuButtonClicked");
   DCHECK_EQ(VIEW_ID_APP_MENU, source->id());
 
   bool use_new_menu = false;
   bool supports_new_separators = false;
   // TODO: remove this.
-#if defined(USE_AURA)
+#if defined(USE_AURA) && !(defined(OS_LINUX) && !defined(OS_CHROMEOS))
   supports_new_separators =
       GetNativeTheme() == ui::NativeThemeAura::instance();
   use_new_menu = supports_new_separators;
 #endif
 #if defined(OS_WIN)
   use_new_menu = use_new_menu || ui::GetDisplayLayout() == ui::LAYOUT_TOUCH;
 #endif
 
   wrench_menu_.reset(new WrenchMenu(browser_, use_new_menu,
                                     supports_new_separators));
@@ skipping 459 matching lines @@
 
 void ToolbarView::OnShowHomeButtonChanged() {
   Layout();
   SchedulePaint();
 }
 
 int ToolbarView::content_shadow_height() const {
   return browser_->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH ?
       kContentShadowHeightAsh : kContentShadowHeight;
 }