Change WTF::TemporaryChange to be an alias for AutoReset

third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp

Index: third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp b/third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp
index b35695f738d1bf5d6b939f1d4598c08b7995d2da..3fdf9f1dcce8d9bbd171cd3dd95106cfc71b44c4 100644
--- a/third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutGeometryMap.cpp
@@ -160,7 +160,7 @@ FloatQuad LayoutGeometryMap::mapToAncestor(const FloatRect& rect, const LayoutBo
 void LayoutGeometryMap::pushMappingsToAncestor(const LayoutObject* layoutObject, const LayoutBoxModelObject* ancestorLayoutObject)
 {
     // We need to push mappings in reverse order here, so do insertions rather than appends.
-    TemporaryChange<size_t> positionChange(m_insertionPosition, m_mapping.size());
+    TemporaryChange<size_t> positionChange(&m_insertionPosition, m_mapping.size());
     do {
         layoutObject = layoutObject->pushMappingToContainer(ancestorLayoutObject, *this);
     } while (layoutObject && layoutObject != ancestorLayoutObject);
@@ -208,7 +208,7 @@ void LayoutGeometryMap::pushMappingsToAncestor(const PaintLayer* layer, const Pa
             pushMappingsToAncestor(ancestorLayer->layoutObject(), 0);
         }
 
-        TemporaryChange<size_t> positionChange(m_insertionPosition, m_mapping.size());
+        TemporaryChange<size_t> positionChange(&m_insertionPosition, m_mapping.size());
         bool accumulatingTransform = layer->layoutObject()->style()->preserves3D() || ancestorLayer->layoutObject()->style()->preserves3D();
         push(layoutObject, toLayoutSize(layerOffset), accumulatingTransform ? AccumulatingTransform : 0);
         return;