[DevTools] Do not delegate menu list rendering in LayoutThemeMobile.

third_party/WebKit/Source/core/layout/LayoutThemeAndroid.h

 // Copyright 2016 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.
 
 #ifndef LayoutThemeAndroid_h
 #define LayoutThemeAndroid_h
 
 #include "core/layout/LayoutThemeMobile.h"
 
 namespace blink {
 
 class LayoutThemeAndroid final : public LayoutThemeMobile {
 public:
     static PassRefPtr<LayoutTheme> create();
+    bool delegatesMenuListRendering() const override { return true; }
 
 private:
     ~LayoutThemeAndroid() override;
 };
 
 } // namespace blink
 
 #endif // LayoutThemeAndroid_h