Move most of the [Pass]RefPtr's of CSSPrimitiveValue to our transition types.

Source/core/css/CSSGradientValue.cpp

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "platform/graphics/Gradient.h"
 #include "platform/graphics/GradientGeneratedImage.h"
 #include "platform/graphics/Image.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
 
 using namespace std;
 
 namespace WebCore {
 
+void CSSGradientColorStop::trace(Visitor* visitor)
+{
+    visitor->trace(m_position);
+    visitor->trace(m_color);
+}
+
 PassRefPtr<Image> CSSGradientValue::image(RenderObject* renderer, const IntSize& size)
 {
     if (size.isEmpty())
         return 0;
 
     bool cacheable = isCacheable();
     if (cacheable) {
         if (!clients().contains(renderer))
             return 0;
 
@@ skipping 398 matching lines @@
 {
     for (size_t i = 0; i < m_stops.size(); ++i) {
         if (m_stops[i].m_resolvedColor.hasAlpha())
             return false;
     }
     return true;
 }
 
 void CSSGradientValue::traceAfterDispatch(Visitor* visitor)
 {
+    visitor->trace(m_firstX);
+    visitor->trace(m_firstY);
+    visitor->trace(m_secondX);
+    visitor->trace(m_secondY);
+    visitor->trace(m_stops);
     CSSImageGeneratorValue::traceAfterDispatch(visitor);
 }
 
 String CSSLinearGradientValue::customCSSText() const
 {
     StringBuilder result;
     if (m_gradientType == CSSDeprecatedLinearGradient) {
         result.appendLiteral("-webkit-gradient(linear, ");
         result.append(m_firstX->cssText());
         result.append(' ');
@@ skipping 258 matching lines @@
     else if (m_firstY)
         equalXandY = compareCSSValuePtr(m_firstY, other.m_firstY) && !other.m_firstX;
     else
         equalXandY = !other.m_firstX && !other.m_firstY;
 
     return equalXandY && m_stops == other.m_stops;
 }
 
 void CSSLinearGradientValue::traceAfterDispatch(Visitor* visitor)
 {
+    visitor->trace(m_angle);
     CSSGradientValue::traceAfterDispatch(visitor);
 }
 
 String CSSRadialGradientValue::customCSSText() const
 {
     StringBuilder result;
 
     if (m_gradientType == CSSDeprecatedRadialGradient) {
         result.appendLiteral("-webkit-gradient(radial, ");
         result.append(m_firstX->cssText());
@@ skipping 413 matching lines @@
     else {
         equalShape = !other.m_shape;
         equalSizingBehavior = !other.m_sizingBehavior;
         equalHorizontalAndVerticalSize = !other.m_endHorizontalSize && !other.m_endVerticalSize;
     }
     return equalShape && equalSizingBehavior && equalHorizontalAndVerticalSize && m_stops == other.m_stops;
 }
 
 void CSSRadialGradientValue::traceAfterDispatch(Visitor* visitor)
 {
+    visitor->trace(m_firstRadius);
+    visitor->trace(m_secondRadius);
+    visitor->trace(m_shape);
+    visitor->trace(m_sizingBehavior);
+    visitor->trace(m_endHorizontalSize);
+    visitor->trace(m_endVerticalSize);
     CSSGradientValue::traceAfterDispatch(visitor);
 }
 
 } // namespace WebCore