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

Source/core/paint/ListMarkerPainter.h

Index: Source/core/paint/ListMarkerPainter.h
diff --git a/Source/core/paint/ListMarkerPainter.h b/Source/core/paint/ListMarkerPainter.h
index bba7cc5cf2d12f65ca5500959823ccfea684c721..eee9dd97c3d7118e9740835a757d03b5ee0d0ccf 100644
--- a/Source/core/paint/ListMarkerPainter.h
+++ b/Source/core/paint/ListMarkerPainter.h
@@ -5,6 +5,8 @@
 #ifndef ListMarkerPainter_h
 #define ListMarkerPainter_h
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 struct PaintInfo;
@@ -13,6 +15,7 @@ class LayoutListMarker;
 class LayoutPoint;
 
 class ListMarkerPainter {
+    STACK_ALLOCATED();
 public:
     ListMarkerPainter(LayoutListMarker& layoutListMarker) : m_layoutListMarker(layoutListMarker) { }