*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/rendering/RenderDeprecatedFlexibleBox.cpp

Index: Source/core/rendering/RenderDeprecatedFlexibleBox.cpp
diff --git a/Source/core/rendering/RenderDeprecatedFlexibleBox.cpp b/Source/core/rendering/RenderDeprecatedFlexibleBox.cpp
index 1463ad62f4c4934e4b695abab13b6be25304dd6a..ba959445f1ee61d3f3607be57abc8d0feaf056d3 100644
--- a/Source/core/rendering/RenderDeprecatedFlexibleBox.cpp
+++ b/Source/core/rendering/RenderDeprecatedFlexibleBox.cpp
@@ -260,13 +260,6 @@ void RenderDeprecatedFlexibleBox::layoutBlock(bool relayoutChildren)
     LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
     LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
 
-    // Regions changing widths can force us to relayout our children.
-    RenderFlowThread* flowThread = flowThreadContainingBlock();
-    if (logicalWidthChangedInRegions(flowThread))
-        relayoutChildren = true;
-    if (updateRegionsAndShapesLogicalSize(flowThread))
-        relayoutChildren = true;
-
     LayoutSize previousSize = size();
 
     updateLogicalWidth();
@@ -294,8 +287,6 @@ void RenderDeprecatedFlexibleBox::layoutBlock(bool relayoutChildren)
 
     layoutPositionedObjects(relayoutChildren || isRoot());
 
-    computeRegionRangeForBlock(flowThread);
-
     computeOverflow(oldClientAfterEdge);
 
     statePusher.pop();