Make classes and structures in core/paint fast-allocated.

Source/core/paint/SVGForeignObjectPainter.h

Index: Source/core/paint/SVGForeignObjectPainter.h
diff --git a/Source/core/paint/SVGForeignObjectPainter.h b/Source/core/paint/SVGForeignObjectPainter.h
index 32976c5eb37c365ec8b09f210b93c4cbc9ce0a5d..1e80acd48c4bf3b7fb9d623e615ac2a63a3c4de0 100644
--- a/Source/core/paint/SVGForeignObjectPainter.h
+++ b/Source/core/paint/SVGForeignObjectPainter.h
@@ -5,12 +5,15 @@
 #ifndef SVGForeignObjectPainter_h
 #define SVGForeignObjectPainter_h
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 struct PaintInfo;
 class LayoutSVGForeignObject;
 
 class SVGForeignObjectPainter {
+    STACK_ALLOCATED();
 public:
     SVGForeignObjectPainter(LayoutSVGForeignObject& layoutSVGForeignObject) : m_layoutSVGForeignObject(layoutSVGForeignObject) { }
     void paint(const PaintInfo&);