Switch to LayoutThemeMobile when emulating mobile device in DevTools.

third_party/WebKit/Source/core/layout/LayoutThemeDefault.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 45 matching lines @@
     Color platformInactiveSelectionBackgroundColor() const override;
     Color platformActiveSelectionForegroundColor() const override;
     Color platformInactiveSelectionForegroundColor() const override;
 
     IntSize sliderTickSize() const override;
     int sliderTickOffsetFromTrackCenter() const override;
     void adjustSliderThumbSize(ComputedStyle&) const override;
 
     static void setCaretBlinkInterval(double);
 
+#if !USE(NEW_THEME)

[pdr., 2016/02/12 06:36:14]

These theme checks are tricky. WDYT about a pixel test to make sure all the
platforms look the same when emulation is enabled? For example, a page that has
all the controls on it and emulation enabled.

[dgozman, 2016/02/19 19:15:16]

I've reworked this to remove all NEW_THEME checks (and the flag altogether). Now
there should be no concern about differences as the code is exactly the same.
I'd prefer to not add an emulation pixel test which will need
attention/rebaselines from anyone working on layout theme. I think there would
be failures and we'll end up disabling it.

     void setCheckboxSize(ComputedStyle&) const override;
     void setRadioSize(ComputedStyle&) const override;
     void adjustInnerSpinButtonStyle(ComputedStyle&) const override;
+    void adjustButtonStyle(ComputedStyle&) const override;
+#endif
 
     bool popsMenuBySpaceKey() const final { return true; }
     bool popsMenuByReturnKey() const final { return true; }
     bool popsMenuByAltDownUpOrF4Key() const override { return true; }
 
     bool shouldOpenPickerWithF4Key() const override;
 
     Color platformTapHighlightColor() const override
     {
         return Color(defaultTapHighlightColor);
     }
 
     // A method asking if the theme's controls actually care about redrawing
     // when hovered.
     bool supportsHover(const ComputedStyle&) const final;
 
     Color platformFocusRingColor() const override;
 
     double caretBlinkInterval() const final;
 
     // System fonts.
     virtual void systemFont(CSSValueID systemFontID, FontStyle&, FontWeight&, float& fontSize, AtomicString& fontFamily) const;
 
     int minimumMenuListSize(const ComputedStyle&) const override;
 
-    void adjustButtonStyle(ComputedStyle&) const override;
     void adjustSearchFieldStyle(ComputedStyle&) const override;
     void adjustSearchFieldCancelButtonStyle(ComputedStyle&) const override;
     void adjustSearchFieldDecorationStyle(ComputedStyle&) const override;
     void adjustSearchFieldResultsDecorationStyle(ComputedStyle&) const override;
 
     // MenuList refers to an unstyled menulist (meaning a menulist without
     // background-color or border set) and MenuListButton refers to a styled
     // menulist (a menulist with background-color or border set). They have
     // this distinction to support showing aqua style themes whenever they
     // possibly can, which is something we don't want to replicate.
@@ skipping 42 matching lines @@
     static unsigned m_activeSelectionForegroundColor;
     static unsigned m_inactiveSelectionBackgroundColor;
     static unsigned m_inactiveSelectionForegroundColor;
 
     ThemePainterDefault m_painter;
 };
 
 } // namespace blink
 
 #endif // LayoutThemeDefault_h