Add grid/flex layout support for <fieldset>

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

 /*
  * 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, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 314 matching lines @@
 
 void LayoutBlock::removeLeftoverAnonymousBlock(LayoutBlock* child)
 {
     ASSERT(child->isAnonymousBlock());
     ASSERT(!child->childrenInline());
     ASSERT(child->parent() == this);
 
     if (child->continuation())
         return;
 
+    if (isFieldset())
+        return;
+
     // Promote all the leftover anonymous block's children (to become children of this block
     // instead). We still want to keep the leftover block in the tree for a moment, for notification
     // purposes done further below (flow threads and grids).
     child->moveAllChildrenTo(this, child->nextSibling());
 
     // Remove all the information in the flow thread associated with the leftover anonymous block.
     child->removeFromLayoutFlowThread();
 
     // LayoutGrid keeps track of its children, we must notify it about changes in the tree.
     if (child->parent()->isLayoutGrid())
@@ skipping 1388 matching lines @@
 }
 
 LayoutBlock* LayoutBlock::createAnonymousWithParentAndDisplay(const LayoutObject* parent, EDisplay display)
 {
     // FIXME: Do we need to convert all our inline displays to block-type in the anonymous logic ?
     EDisplay newDisplay;
     LayoutBlock* newBox = nullptr;
     if (display == FLEX || display == INLINE_FLEX) {
         newBox = LayoutFlexibleBox::createAnonymous(&parent->document());
         newDisplay = FLEX;
+    } else if (display == GRID || display == INLINE_GRID) {
+        newBox = LayoutGrid::createAnonymous(&parent->document());
+        newDisplay = GRID;
     } else {
         newBox = LayoutBlockFlow::createAnonymous(&parent->document());
         newDisplay = BLOCK;
     }
 
     RefPtr<ComputedStyle> newStyle = ComputedStyle::createAnonymousStyleWithDisplay(parent->styleRef(), newDisplay);
     parent->updateAnonymousChildStyle(*newBox, *newStyle);
     newBox->setStyle(newStyle.release());
     return newBox;
 }
@@ skipping 118 matching lines @@
         for (TrackedLayoutBoxListHashSet::const_iterator it = positionedDescendantSet->begin(); it != end; ++it) {
             LayoutBox* currBox = *it;
             ASSERT(!currBox->needsLayout());
         }
     }
 }
 
 #endif
 
 } // namespace blink