Revert scrollbar freezing. Hopefully some tests will fail.

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

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
index 1b64042e1b0b87a92d3e41a6e0e1298a907d381f..3c6b59d257f81b05416e0eb57154de529032b02d 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
@@ -538,8 +538,6 @@ inline bool LayoutBlockFlow::layoutBlockFlow(bool relayoutChildren,
 
   TextAutosizer::LayoutScope textAutosizerLayoutScope(this, &layoutScope);
 
-  bool preferredLogicalWidthsWereDirty = preferredLogicalWidthsDirty();
-
   // Reset the flag here instead of in layoutInlineChildren() in case that
   // all inline children are removed from this block.
   setContainsInlineWithOutlineAndContinuation(false);
@@ -548,17 +546,6 @@ inline bool LayoutBlockFlow::layoutBlockFlow(bool relayoutChildren,
   else
     layoutBlockChildren(relayoutChildren, layoutScope, beforeEdge, afterEdge);
 
-  bool preferredLogicalWidthsBecameDirty =
-      !preferredLogicalWidthsWereDirty && preferredLogicalWidthsDirty();
-  if (preferredLogicalWidthsBecameDirty) {
-    // The only thing that should dirty preferred widths at this point is the
-    // addition of overflow:auto scrollbars in a descendant. To avoid a
-    // potential infinite loop, run layout again with auto scrollbars frozen in
-    // their current state.
-    PaintLayerScrollableArea::FreezeScrollbarsScope freezeScrollbars;
-    return layoutBlockFlow(relayoutChildren, pageLogicalHeight, layoutScope);
-  }
-
   // Expand our intrinsic height to encompass floats.
   if (lowestFloatLogicalBottom() > (logicalHeight() - afterEdge) &&
       createsNewFormattingContext())