Have RenderBlockFlow sub-classes' methods call their super-class method properly.

Source/core/rendering/RenderRegion.cpp

Index: Source/core/rendering/RenderRegion.cpp
diff --git a/Source/core/rendering/RenderRegion.cpp b/Source/core/rendering/RenderRegion.cpp
index 59514b2b795bd25876927d87322862d15bcafbd0..d042526db3a479187e18e444e63e21001559c180 100644
--- a/Source/core/rendering/RenderRegion.cpp
+++ b/Source/core/rendering/RenderRegion.cpp
@@ -530,14 +530,14 @@ void RenderRegion::restoreRegionObjectsOriginalStyle()
 
 void RenderRegion::insertedIntoTree()
 {
-    RenderBlock::insertedIntoTree();
+    RenderBlockFlow::insertedIntoTree();
 
     attachRegion();
 }
 
 void RenderRegion::willBeRemovedFromTree()
 {
-    RenderBlock::willBeRemovedFromTree();
+    RenderBlockFlow::willBeRemovedFromTree();
 
     detachRegion();
 }
@@ -617,7 +617,7 @@ void RenderRegion::clearObjectStyleInRegion(const RenderObject* object)
 void RenderRegion::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
 {
     if (!isValid()) {
-        RenderBlock::computeIntrinsicLogicalWidths(minLogicalWidth, maxLogicalWidth);
+        RenderBlockFlow::computeIntrinsicLogicalWidths(minLogicalWidth, maxLogicalWidth);
         return;
     }