Oilpan: move SVG property hierarchy to the heap.

Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp

Index: Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp
diff --git a/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp b/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp
index ff4cd225ef401bb6c7db852f101e569d0ebe41cc..1086edd1e60738ae4c92a6f56044fb92a50099ce 100644
--- a/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp
+++ b/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.cpp
@@ -179,11 +179,11 @@ static inline void updateCharacterData(unsigned i, float& lastRotation, SVGChara
 
 void SVGTextLayoutAttributesBuilder::fillCharacterDataMap(const TextPosition& position)
 {
-    RefPtr<SVGLengthList> xList = position.element->x()->currentValue();
-    RefPtr<SVGLengthList> yList = position.element->y()->currentValue();
-    RefPtr<SVGLengthList> dxList = position.element->dx()->currentValue();
-    RefPtr<SVGLengthList> dyList = position.element->dy()->currentValue();
-    RefPtr<SVGNumberList> rotateList = position.element->rotate()->currentValue();
+    RefPtrWillBeRawPtr<SVGLengthList> xList = position.element->x()->currentValue();
+    RefPtrWillBeRawPtr<SVGLengthList> yList = position.element->y()->currentValue();
+    RefPtrWillBeRawPtr<SVGLengthList> dxList = position.element->dx()->currentValue();
+    RefPtrWillBeRawPtr<SVGLengthList> dyList = position.element->dy()->currentValue();
+    RefPtrWillBeRawPtr<SVGNumberList> rotateList = position.element->rotate()->currentValue();
 
     unsigned xListSize = xList->length();
     unsigned yListSize = yList->length();