SELECT element: Fix a bug that intrinsic width is too narrow in less-than-100% zoom level.

third_party/WebKit/Source/core/paint/ThemePainterDefault.h

 /*
  * This file is part of the WebKit project.
  *
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
  * Copyright (C) 2007 Holger Hans Peter Freyther
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008, 2009 Google, Inc.
  * All rights reserved.
  * Copyright (C) 2009 Kenneth Rohde Christiansen
@@ skipping 17 matching lines @@
 
 #ifndef ThemePainterDefault_h
 #define ThemePainterDefault_h
 
 #include "core/paint/ThemePainter.h"
 #include "public/platform/WebThemeEngine.h"
 
 namespace blink {
 
 class LayoutBox;
+class LayoutThemeDefault;
 
 class ThemePainterDefault final : public ThemePainter {
  public:
-  ThemePainterDefault();
+  explicit ThemePainterDefault(LayoutThemeDefault&);
 
  private:
   bool paintCheckbox(const LayoutObject&,
                      const PaintInfo&,
                      const IntRect&) override;
   bool paintRadio(const LayoutObject&,
                   const PaintInfo&,
                   const IntRect&) override;
   bool paintButton(const LayoutObject&,
                    const PaintInfo&,
@@ skipping 25 matching lines @@
   bool paintSearchField(const LayoutObject&,
                         const PaintInfo&,
                         const IntRect&) override;
   bool paintSearchFieldCancelButton(const LayoutObject&,
                                     const PaintInfo&,
                                     const IntRect&) override;
 
   void setupMenuListArrow(const LayoutBox&,
                           const IntRect&,
                           WebThemeEngine::ExtraParams&);
+
+  // ThemePaintDefault is a part object of m_theme.
+  LayoutThemeDefault& m_theme;
 };
 
 }  // namespace blink
 
 #endif  // ThemePainerDefault_h