Move viewport unit resolution to style recalc time

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 05955691af573fc99f2d0102d0b46c6a62b72e2f..4fa84d30c22c9a2e7dec036128aadb105bffbc63 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -320,10 +320,7 @@ void RenderView::layout()
             if ((child->isBox() && toRenderBox(child)->hasRelativeLogicalHeight())
                     || child->style()->logicalHeight().isPercent()
                     || child->style()->logicalMinHeight().isPercent()
-                    || child->style()->logicalMaxHeight().isPercent()
-                    || child->style()->logicalHeight().isViewportPercentage()
-                    || child->style()->logicalMinHeight().isViewportPercentage()
-                    || child->style()->logicalMaxHeight().isViewportPercentage())
+                    || child->style()->logicalMaxHeight().isPercent())
                 layoutScope.setChildNeedsLayout(child);
         }
 
@@ -1213,26 +1210,26 @@ bool RenderView::backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const
     return m_frameView->hasOpaqueBackground();
 }
 
-LayoutUnit RenderView::viewportPercentageWidth(float percentage) const
+double RenderView::viewportWidthPercent() const
 {
-    return viewLogicalWidth(ScrollableArea::IncludeScrollbars) * percentage / 100.f;
+    float scale = m_frameView ? m_frameView->frame().pageZoomFactor() : 1;
+    return viewWidth(ScrollableArea::IncludeScrollbars) / scale / 100.f;
 }
 
-LayoutUnit RenderView::viewportPercentageHeight(float percentage) const
+double RenderView::viewportHeightPercent() const
 {
-    return viewLogicalHeight(ScrollableArea::IncludeScrollbars) * percentage / 100.f;
+    float scale = m_frameView ? m_frameView->frame().pageZoomFactor() : 1;
+    return viewHeight(ScrollableArea::IncludeScrollbars) / scale / 100.f;
 }
 
-LayoutUnit RenderView::viewportPercentageMin(float percentage) const
+double RenderView::viewportMinPercent() const
 {
-    return std::min(viewLogicalWidth(ScrollableArea::IncludeScrollbars), viewLogicalHeight(ScrollableArea::IncludeScrollbars))
-        * percentage / 100.f;
+    return std::min(viewportWidthPercent(), viewportHeightPercent());
 }
 
-LayoutUnit RenderView::viewportPercentageMax(float percentage) const
+double RenderView::viewportMaxPercent() const
 {
-    return std::max(viewLogicalWidth(ScrollableArea::IncludeScrollbars), viewLogicalHeight(ScrollableArea::IncludeScrollbars))
-        * percentage / 100.f;
+    return std::max(viewportWidthPercent(), viewportHeightPercent());
 }
 
 FragmentationDisabler::FragmentationDisabler(RenderObject* root)