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

Source/core/layout/LayoutGeometryMap.h

Index: Source/core/layout/LayoutGeometryMap.h
diff --git a/Source/core/layout/LayoutGeometryMap.h b/Source/core/layout/LayoutGeometryMap.h
index d24718979decfe25803cedbfde76f0484931611a..39f38345ddb746d90f327c07f4bceeab3d25b25c 100644
--- a/Source/core/layout/LayoutGeometryMap.h
+++ b/Source/core/layout/LayoutGeometryMap.h
@@ -33,6 +33,7 @@
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/geometry/LayoutSize.h"
+#include "wtf/Allocator.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
@@ -44,6 +45,7 @@ class TransformState;
 
 // Can be used while walking the layout tree to cache data about offsets and transforms.
 class CORE_EXPORT LayoutGeometryMap {
+    DISALLOW_ALLOCATION();
     WTF_MAKE_NONCOPYABLE(LayoutGeometryMap);
 public:
     LayoutGeometryMap(MapCoordinatesFlags = UseTransforms);