logicalHeightWithVisibleOverflow() needs to include overhanging floats.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003-2013 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ skipping 359 matching lines @@
       FloatingObject::Type = FloatingObject::FloatLeftRight) const;
 
   bool hasOverhangingFloats() const {
     return parent() && containsFloats() &&
            lowestFloatLogicalBottom() > logicalHeight();
   }
   bool isOverhangingFloat(const FloatingObject& floatObject) const {
     return logicalBottomForFloat(floatObject) > logicalHeight();
   }
 
+  LayoutUnit logicalHeightWithVisibleOverflow() const final;
+
   // This function is only public so we can call it from NGBox while we're
   // still working on LayoutNG.
   void updateIsSelfCollapsing() {
     m_isSelfCollapsing = checkIfIsSelfCollapsingBlock();
   }
 
 #ifndef NDEBUG
   void showLineTreeAndMark(const InlineBox* = nullptr,
                            const char* = nullptr,
                            const InlineBox* = nullptr,
@@ skipping 534 matching lines @@
   void positionDialog();
 
   // END METHODS DEFINED IN LayoutBlockFlowLine
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlockFlow, isLayoutBlockFlow());
 
 }  // namespace blink
 
 #endif  // LayoutBlockFlow_h