Factor code from ThemeMac into ThemeMacPainter.

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

 /*
  * Copyright (C) 2007 Apple Inc.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Collabora Ltd.
  * Copyright (C) 2008, 2009 Google Inc.
  * Copyright (C) 2009 Kenneth Rohde Christiansen
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 116 matching lines @@
     partRect.move(offsetFromInputLayoutObject);
     // Account for the local drawing offset.
     partRect.move(localOffset.x(), localOffset.y());
 
     return pixelSnappedIntRect(partRect);
 }
 
 } // namespace
 
 ThemePainterDefault::ThemePainterDefault()
-    : ThemePainter(nullptr)
+    : ThemePainter()
 {
 }
 
 bool ThemePainterDefault::paintCheckbox(const LayoutObject& o, const PaintInfo& i, const IntRect& rect)
 {
     WebThemeEngine::ExtraParams extraParams;
     WebCanvas* canvas = i.context.canvas();
     extraParams.button.checked = LayoutTheme::isChecked(o);
     extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
 
@@ skipping 244 matching lines @@
         cancelButtonSize, cancelButtonSize);
     IntRect paintingRect = convertToPaintingRect(inputLayoutBox, cancelButtonObject, cancelButtonRect, r);
 
     DEFINE_STATIC_REF(Image, cancelImage, (Image::loadPlatformResource("searchCancel")));
     DEFINE_STATIC_REF(Image, cancelPressedImage, (Image::loadPlatformResource("searchCancelPressed")));
     paintInfo.context.drawImage(LayoutTheme::isPressed(cancelButtonObject) ? cancelPressedImage : cancelImage, paintingRect);
     return false;
 }
 
 } // namespace blink