[CSS Regions] Rename region-overflow to region-fragment

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index 7238dedf08530eeb8dddd4a81e6cb2749db41b97..59cf08a104109d077f8422ca36840e9c1edbac7a 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -844,7 +844,7 @@ public:
 
     const AtomicString& flowThread() const { return rareNonInheritedData->m_flowThread; }
     const AtomicString& regionThread() const { return rareNonInheritedData->m_regionThread; }
-    RegionOverflow regionOverflow() const { return static_cast<RegionOverflow>(rareNonInheritedData->m_regionOverflow); }
+    RegionFragment regionFragment() const { return static_cast<RegionFragment>(rareNonInheritedData->m_regionFragment); }
 
     const AtomicString& lineGrid() const { return rareInheritedData->m_lineGrid; }
     LineSnap lineSnap() const { return static_cast<LineSnap>(rareInheritedData->m_lineSnap); }
@@ -1276,7 +1276,7 @@ public:
 
     void setFlowThread(const AtomicString& flowThread) { SET_VAR(rareNonInheritedData, m_flowThread, flowThread); }
     void setRegionThread(const AtomicString& regionThread) { SET_VAR(rareNonInheritedData, m_regionThread, regionThread); }
-    void setRegionOverflow(RegionOverflow regionOverflow) { SET_VAR(rareNonInheritedData, m_regionOverflow, regionOverflow); }
+    void setRegionFragment(RegionFragment regionFragment) { SET_VAR(rareNonInheritedData, m_regionFragment, regionFragment); }
 
     void setWrapFlow(WrapFlow wrapFlow) { SET_VAR(rareNonInheritedData, m_wrapFlow, wrapFlow); }
     void setWrapThrough(WrapThrough wrapThrough) { SET_VAR(rareNonInheritedData, m_wrapThrough, wrapThrough); }
@@ -1626,7 +1626,7 @@ public:
 
     static const AtomicString& initialFlowThread() { return nullAtom; }
     static const AtomicString& initialRegionThread() { return nullAtom; }
-    static RegionOverflow initialRegionOverflow() { return AutoRegionOverflow; }
+    static RegionFragment initialRegionFragment() { return AutoRegionFragment; }
 
     static WrapFlow initialWrapFlow() { return WrapFlowAuto; }
     static WrapThrough initialWrapThrough() { return WrapThroughWrap; }