Change Views menus to consistently use GetNativeTheme for theming.

ui/views/controls/menu/menu_runner_impl.cc

 // Copyright 2014 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 "ui/views/controls/menu/menu_runner_impl.h"
 
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/menu/menu_controller.h"
 #include "ui/views/controls/menu/menu_delegate.h"
@@ skipping 91 matching lines @@
       controller = NULL;
     }
   }
 
   running_ = true;
   for_drop_ = (run_types & MenuRunner::FOR_DROP) != 0;
   bool has_mnemonics = (run_types & MenuRunner::HAS_MNEMONICS) != 0;
   owns_controller_ = false;
   if (!controller) {
     // No menus are showing, show one.
-    ui::NativeTheme* theme =
-        parent ? parent->GetNativeTheme() : ui::NativeTheme::instance();
-    controller = new MenuController(theme, !for_drop_, this);
+    controller = new MenuController(!for_drop_, this);
     owns_controller_ = true;
   }
   controller->set_is_combobox((run_types & MenuRunner::COMBOBOX) != 0);
   controller_ = controller;
   menu_->set_controller(controller_);
   menu_->PrepareForRun(owns_controller_,
                        has_mnemonics,
                        !for_drop_ && ShouldShowMnemonics(button));
 
   // Run the loop.
@@ skipping 83 matching lines @@
 #if defined(OS_WIN)
   // This is only needed on Windows.
   if (!show_mnemonics)
     show_mnemonics = ui::win::IsAltPressed();
 #endif
   return show_mnemonics;
 }
 
 }  // namespace internal
 }  // namespace views