Move isValid/isCurrentColor from Color to StyleColor

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 1153 matching lines @@
     if (backgroundIsKnownToBeObscured())
         return;
     paintFillLayers(paintInfo, resolveColor(CSSPropertyBackgroundColor), style()->backgroundLayers(), paintRect, bleedAvoidance);
 }
 
 LayoutRect RenderBox::backgroundPaintedExtent() const
 {
     ASSERT(hasBackground());
     LayoutRect backgroundRect = pixelSnappedIntRect(borderBoxRect());
 
-    Color backgroundColor = resolveColor(CSSPropertyBackgroundColor);
+    StyleColor backgroundColor = resolveStyleColor(CSSPropertyBackgroundColor);
     if (backgroundColor.isValid() && backgroundColor.alpha())
         return backgroundRect;
     if (!style()->backgroundLayers()->image() || style()->backgroundLayers()->next())
         return backgroundRect;
     BackgroundImageGeometry geometry;
     const_cast<RenderBox*>(this)->calculateBackgroundImageGeometry(style()->backgroundLayers(), backgroundRect, geometry);
     return geometry.destRect();
 }
 
 bool RenderBox::backgroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect) const
 {
     if (isBody() && skipBodyBackground(this))
         return false;
 
-    Color backgroundColor = resolveColor(CSSPropertyBackgroundColor);
+    StyleColor backgroundColor = resolveStyleColor(CSSPropertyBackgroundColor);
     if (!backgroundColor.isValid() || backgroundColor.hasAlpha())
         return false;
 
     // If the element has appearance, it might be painted by theme.
     // We cannot be sure if theme paints the background opaque.
     // In this case it is safe to not assume opaqueness.
     // FIXME: May be ask theme if it paints opaque.
     if (style()->hasAppearance())
         return false;
     // FIXME: Check the opaqueness of background images.
@@ skipping 97 matching lines @@
 
     // Clipped with local scrolling
     if (hasOverflowClip() && fillLayer->attachment() == LocalBackgroundAttachment)
         return false;
 
     if (fillLayer->hasOpaqueImage(this) && fillLayer->hasRepeatXY() && fillLayer->image()->canRender(this, style()->effectiveZoom()))
         return true;
 
     // If there is only one layer and no image, check whether the background color is opaque
     if (!fillLayer->next() && !fillLayer->hasImage()) {
-        Color bgColor = resolveColor(CSSPropertyBackgroundColor);
+        StyleColor bgColor = resolveStyleColor(CSSPropertyBackgroundColor);
         if (bgColor.isValid() && bgColor.alpha() == 255)
             return true;
     }
 
     return false;
 }
 
 void RenderBox::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (!paintInfo.shouldPaintWithinRoot(this) || style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask || paintInfo.context->paintingDisabled())
@@ skipping 3323 matching lines @@
     }
 
     if (didSplitParentAnonymousBoxes)
         markBoxForRelayoutAfterSplit(this);
 
     ASSERT(beforeChild->parent() == this);
     return beforeChild;
 }
 
 } // namespace WebCore