[css-flexbox] logical widths are always definite.

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

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 464aa2775f1b570c3ff8dbf14ec791a4f63b1d77..e775c8b624e9c44ba916fc60ef3d408743d13ad9 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -2254,11 +2254,6 @@ void LayoutBox::computeLogicalWidth(LogicalExtentComputedValues& computedValues)
         // Implied minimum size of Grid items.
         computedValues.m_extent = constrainLogicalWidthByMinMax(minPreferredLogicalWidth(), containerWidthInInlineDirection, cb);
     } else {
-        if (!hasPerpendicularContainingBlock && cb->isFlexItem() && styleToUse.logicalWidth().hasPercent() && !isOutOfFlowPositioned()) {
-            LayoutUnit stretchedWidth = toLayoutFlexibleBox(cb->parent())->childLogicalWidthForPercentageResolution(*cb);
-            if (stretchedWidth != LayoutUnit(-1))
-                containerWidthInInlineDirection = stretchedWidth;
-        }
         LayoutUnit preferredWidth = computeLogicalWidthUsing(MainOrPreferredSize, styleToUse.logicalWidth(), containerWidthInInlineDirection, cb);
         computedValues.m_extent = constrainLogicalWidthByMinMax(preferredWidth, containerWidthInInlineDirection, cb);
     }