Constify and use LayoutStyle reference in layout/

Source/core/layout/LayoutTable.cpp

Index: Source/core/layout/LayoutTable.cpp
diff --git a/Source/core/layout/LayoutTable.cpp b/Source/core/layout/LayoutTable.cpp
index 224e1115399565b3219678411cfdc1985341f393..f3193b9c686d001976bfef49664983393694d26d 100644
--- a/Source/core/layout/LayoutTable.cpp
+++ b/Source/core/layout/LayoutTable.cpp
@@ -688,17 +688,17 @@ void LayoutTable::computePreferredLogicalWidths()
     for (unsigned i = 0; i < m_captions.size(); i++)
         m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, m_captions[i]->minPreferredLogicalWidth());
 
-    LayoutStyle* styleToUse = style();
+    const LayoutStyle& styleToUse = styleRef();
     // FIXME: This should probably be checking for isSpecified since you should be able to use percentage or calc values for min-width.
-    if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) {
-        m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
-        m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
+    if (styleToUse.logicalMinWidth().isFixed() && styleToUse.logicalMinWidth().value() > 0) {
+        m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth().value()));
+        m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth().value()));
     }
 
     // FIXME: This should probably be checking for isSpecified since you should be able to use percentage or calc values for maxWidth.
-    if (styleToUse->logicalMaxWidth().isFixed()) {
+    if (styleToUse.logicalMaxWidth().isFixed()) {
         // We don't constrain m_minPreferredLogicalWidth as the table should be at least the size of its min-content, regardless of 'max-width'.
-        m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value()));
+        m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMaxWidth().value()));
         m_maxPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
     }