Move viewport unit resolution to style recalc time

Source/core/rendering/RenderFlexibleBox.cpp

Index: Source/core/rendering/RenderFlexibleBox.cpp
diff --git a/Source/core/rendering/RenderFlexibleBox.cpp b/Source/core/rendering/RenderFlexibleBox.cpp
index 65c82221b62186787391f1900db78e5043ad82c7..cb014c275319b1c5924fd66743f11bb706a5a885 100644
--- a/Source/core/rendering/RenderFlexibleBox.cpp
+++ b/Source/core/rendering/RenderFlexibleBox.cpp
@@ -814,17 +814,16 @@ LayoutUnit RenderFlexibleBox::marginBoxAscentForChild(RenderBox* child)
     return ascent + flowAwareMarginBeforeForChild(child);
 }
 
-LayoutUnit RenderFlexibleBox::computeChildMarginValue(Length margin, RenderView* view)
+LayoutUnit RenderFlexibleBox::computeChildMarginValue(Length margin)
 {
     // When resolving the margins, we use the content size for resolving percent and calc (for percents in calc expressions) margins.
     // Fortunately, percent margins are always computed with respect to the block's width, even for margin-top and margin-bottom.
     LayoutUnit availableSize = contentLogicalWidth();
-    return minimumValueForLength(margin, availableSize, view);
+    return minimumValueForLength(margin, availableSize);
 }
 
 void RenderFlexibleBox::prepareOrderIteratorAndMargins()
 {
-    RenderView* renderView = view();
     OrderIteratorPopulator populator(m_orderIterator);
 
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
@@ -836,11 +835,11 @@ void RenderFlexibleBox::prepareOrderIteratorAndMargins()
         // Before running the flex algorithm, 'auto' has a margin of 0.
         // Also, if we're not auto sizing, we don't do a layout that computes the start/end margins.
         if (isHorizontalFlow()) {
-            child->setMarginLeft(computeChildMarginValue(child->style()->marginLeft(), renderView));
-            child->setMarginRight(computeChildMarginValue(child->style()->marginRight(), renderView));
+            child->setMarginLeft(computeChildMarginValue(child->style()->marginLeft()));
+            child->setMarginRight(computeChildMarginValue(child->style()->marginRight()));
         } else {
-            child->setMarginTop(computeChildMarginValue(child->style()->marginTop(), renderView));
-            child->setMarginBottom(computeChildMarginValue(child->style()->marginBottom(), renderView));
+            child->setMarginTop(computeChildMarginValue(child->style()->marginTop()));
+            child->setMarginBottom(computeChildMarginValue(child->style()->marginBottom()));
         }
     }
 }