Revert of Recompute overflow after transform changes

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index 893f02a5e99c80ca095e858c4f6e2e2613403b81..d54ecf624f1ce1b3de5fa03529f2079a6eac7ca4 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -4849,93 +4849,6 @@ RenderBlockFlow* RenderBlock::createAnonymousColumnSpanWithParentRenderer(const
     return newBox;
 }
 
-bool RenderBlock::recalcChildOverflowAfterStyleChange()
-{
-    ASSERT(childNeedsOverflowRecalcAfterStyleChange());
-    setChildNeedsOverflowRecalcAfterStyleChange(false);
-
-    bool childrenOverflowChanged = false;
-
-    if (childrenInline()) {
-        ListHashSet<RootInlineBox*> lineBoxes;
-        for (InlineWalker walker(this); !walker.atEnd(); walker.advance()) {
-            RenderObject* renderer = walker.current();
-            if (renderer->isOutOfFlowPositioned() || !renderer->needsOverflowRecalcAfterStyleChange())
-                continue;
-
-            RenderBlock* block = toRenderBlock(renderer);
-            if (!block->recalcOverflowAfterStyleChange())
-                continue;
-
-            childrenOverflowChanged = true;
-            if (InlineBox* inlineBoxWrapper = block->inlineBoxWrapper())
-                lineBoxes.add(&inlineBoxWrapper->root());
-        }
-
-        // FIXME: Glyph overflow will get lost in this case, but not really a big deal.
-        GlyphOverflowAndFallbackFontsMap textBoxDataMap;
-        for (ListHashSet<RootInlineBox*>::const_iterator it = lineBoxes.begin(); it != lineBoxes.end(); ++it) {
-            RootInlineBox* box = *it;
-            box->computeOverflow(box->lineTop(), box->lineBottom(), textBoxDataMap);
-        }
-    } else {
-        for (RenderBox* box = firstChildBox(); box; box = box->nextSiblingBox()) {
-            if (box->isOutOfFlowPositioned() || !box->needsOverflowRecalcAfterStyleChange())
-                continue;
-
-            RenderBlock* block = toRenderBlock(box);
-            if (!block->recalcOverflowAfterStyleChange())
-                continue;
-
-            childrenOverflowChanged = true;
-        }
-    }
-
-    TrackedRendererListHashSet* positionedDescendants = positionedObjects();
-    if (!positionedDescendants)
-        return childrenOverflowChanged;
-
-    TrackedRendererListHashSet::iterator end = positionedDescendants->end();
-    for (TrackedRendererListHashSet::iterator it = positionedDescendants->begin(); it != end; ++it) {
-        RenderBox* box = *it;
-
-        if (!box->needsOverflowRecalcAfterStyleChange())
-            continue;
-        RenderBlock* block = toRenderBlock(box);
-        if (!block->recalcOverflowAfterStyleChange() || box->style()->position() == FixedPosition)
-            continue;
-
-        childrenOverflowChanged = true;
-    }
-    return childrenOverflowChanged;
-}
-
-bool RenderBlock::recalcOverflowAfterStyleChange()
-{
-    ASSERT(needsOverflowRecalcAfterStyleChange());
-
-    bool childrenOverflowChanged = false;
-    if (childNeedsOverflowRecalcAfterStyleChange())
-        childrenOverflowChanged = recalcChildOverflowAfterStyleChange();
-
-    if (!selfNeedsOverflowRecalcAfterStyleChange() && !childrenOverflowChanged)
-        return false;
-
-    setSelfNeedsOverflowRecalcAfterStyleChange(false);
-    // If the current block needs layout, overflow will be recalculated during
-    // layout time anyway. We can safely exit here.
-    if (needsLayout())
-        return false;
-
-    LayoutUnit oldClientAfterEdge = hasRenderOverflow() ? m_overflow->layoutClientAfterEdge() : clientLogicalBottom();
-    computeOverflow(oldClientAfterEdge, true);
-
-    if (hasOverflowClip())
-        layer()->scrollableArea()->updateAfterOverflowRecalc();
-
-    return !hasOverflowClip();
-}
-
 #ifndef NDEBUG
 void RenderBlock::checkPositionedObjectsNeedLayout()
 {