Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/PatternAttributes.h

Index: Source/core/svg/PatternAttributes.h
diff --git a/Source/core/svg/PatternAttributes.h b/Source/core/svg/PatternAttributes.h
index f7378e4905661486cef1eb5c7d11a11140863880..779e2355f984224f47223d343f15c3ba80ebaebc 100644
--- a/Source/core/svg/PatternAttributes.h
+++ b/Source/core/svg/PatternAttributes.h
@@ -22,13 +22,16 @@
 
 #include "core/svg/SVGLength.h"
 #include "core/svg/SVGPreserveAspectRatio.h"
+#include "platform/heap/Handle.h"
 #include "platform/transforms/AffineTransform.h"
 
 namespace blink {
 
 class SVGPatternElement;
 
-struct PatternAttributes {
+class PatternAttributes final {
+    DISALLOW_ALLOCATION();
+public:
     PatternAttributes()
         : m_x(SVGLength::create(LengthModeWidth))
         , m_y(SVGLength::create(LengthModeHeight))
@@ -38,7 +41,7 @@ struct PatternAttributes {
         , m_preserveAspectRatio(SVGPreserveAspectRatio::create())
         , m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
         , m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
-        , m_patternContentElement(0)
+        , m_patternContentElement(nullptr)
         , m_xSet(false)
         , m_ySet(false)
         , m_widthSet(false)
@@ -63,25 +66,25 @@ struct PatternAttributes {
     AffineTransform patternTransform() const { return m_patternTransform; }
     const SVGPatternElement* patternContentElement() const { return m_patternContentElement; }
 
-    void setX(PassRefPtr<SVGLength> value)
+    void setX(PassRefPtrWillBeRawPtr<SVGLength> value)
     {
         m_x = value;
         m_xSet = true;
     }
 
-    void setY(PassRefPtr<SVGLength> value)
+    void setY(PassRefPtrWillBeRawPtr<SVGLength> value)
     {
         m_y = value;
         m_ySet = true;
     }
 
-    void setWidth(PassRefPtr<SVGLength> value)
+    void setWidth(PassRefPtrWillBeRawPtr<SVGLength> value)
     {
         m_width = value;
         m_widthSet = true;
     }
 
-    void setHeight(PassRefPtr<SVGLength> value)
+    void setHeight(PassRefPtrWillBeRawPtr<SVGLength> value)
     {
         m_height = value;
         m_heightSet = true;
@@ -93,7 +96,7 @@ struct PatternAttributes {
         m_viewBoxSet = true;
     }
 
-    void setPreserveAspectRatio(PassRefPtr<SVGPreserveAspectRatio> value)
+    void setPreserveAspectRatio(PassRefPtrWillBeRawPtr<SVGPreserveAspectRatio> value)
     {
         m_preserveAspectRatio = value;
         m_preserveAspectRatioSet = true;
@@ -134,18 +137,28 @@ struct PatternAttributes {
     bool hasPatternTransform() const { return m_patternTransformSet; }
     bool hasPatternContentElement() const { return m_patternContentElementSet; }
 
+    void trace(Visitor* visitor)
+    {
+        visitor->trace(m_x);
+        visitor->trace(m_y);
+        visitor->trace(m_width);
+        visitor->trace(m_height);
+        visitor->trace(m_preserveAspectRatio);
+        visitor->trace(m_patternContentElement);
+    }
+
 private:
     // Properties
-    RefPtr<SVGLength> m_x;
-    RefPtr<SVGLength> m_y;
-    RefPtr<SVGLength> m_width;
-    RefPtr<SVGLength> m_height;
+    RefPtrWillBeMember<SVGLength> m_x;
+    RefPtrWillBeMember<SVGLength> m_y;
+    RefPtrWillBeMember<SVGLength> m_width;
+    RefPtrWillBeMember<SVGLength> m_height;
     FloatRect m_viewBox;
-    RefPtr<SVGPreserveAspectRatio> m_preserveAspectRatio;
+    RefPtrWillBeMember<SVGPreserveAspectRatio> m_preserveAspectRatio;
     SVGUnitTypes::SVGUnitType m_patternUnits;
     SVGUnitTypes::SVGUnitType m_patternContentUnits;
     AffineTransform m_patternTransform;
-    const SVGPatternElement* m_patternContentElement;
+    RawPtrWillBeMember<const SVGPatternElement> m_patternContentElement;
 
     // Property states
     bool m_xSet : 1;
@@ -162,4 +175,4 @@ private:
 
 } // namespace blink
 
-#endif
+#endif // PatternAttributes_h