Use correct container width as base for percentage margins.

Source/core/rendering/RenderTable.cpp

Index: Source/core/rendering/RenderTable.cpp
diff --git a/Source/core/rendering/RenderTable.cpp b/Source/core/rendering/RenderTable.cpp
index 46cd22b6b89cbc26c1c998cb0b03e212cc78a462..3f23ef36f2eceac0d6881fe89189de928b2aeca5 100644
--- a/Source/core/rendering/RenderTable.cpp
+++ b/Source/core/rendering/RenderTable.cpp
@@ -305,12 +305,9 @@ void RenderTable::updateLogicalWidth()
     setMarginStart(0);
     setMarginEnd(0);
     if (!hasPerpendicularContainingBlock) {
-        LayoutUnit containerLogicalWidthForAutoMargins = availableLogicalWidth;
-        if (avoidsFloats() && cb->containsFloats())
-            containerLogicalWidthForAutoMargins = containingBlockAvailableLineWidth();
         ComputedMarginValues marginValues;
         bool hasInvertedDirection =  cb->style()->isLeftToRightDirection() == style()->isLeftToRightDirection();
-        computeInlineDirectionMargins(cb, containerLogicalWidthForAutoMargins, logicalWidth(),
+        computeInlineDirectionMargins(cb, availableLogicalWidth, logicalWidth(),
             hasInvertedDirection ? marginValues.m_start : marginValues.m_end,
             hasInvertedDirection ? marginValues.m_end : marginValues.m_start);
         setMarginStart(marginValues.m_start);