Treat <table> widths of 0 as auto.

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

Index: third_party/WebKit/Source/core/layout/LayoutTable.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTable.cpp b/third_party/WebKit/Source/core/layout/LayoutTable.cpp
index ae3e5c0d4391dc2582f8f17f34240e74cad2ecce..aa62071142fcc9df8fcacffe04b5a3a413590236 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTable.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTable.cpp
@@ -252,6 +252,12 @@ void LayoutTable::removeColumn(const LayoutTableCol*)
     setNeedsSectionRecalc();
 }
 
+bool LayoutTable::isLogicalWidthAuto() const
+{
+    Length styleLogicalWidth = style()->logicalWidth();
+    return (!styleLogicalWidth.isSpecified() || !styleLogicalWidth.isPositive()) && !styleLogicalWidth.isIntrinsic();
+}
+
 void LayoutTable::updateLogicalWidth()
 {
     recalcSectionsIfNeeded();
@@ -272,7 +278,7 @@ void LayoutTable::updateLogicalWidth()
     LayoutUnit containerWidthInInlineDirection = hasPerpendicularContainingBlock ? perpendicularContainingBlockLogicalHeight() : availableLogicalWidth;
 
     Length styleLogicalWidth = style()->logicalWidth();
-    if ((styleLogicalWidth.isSpecified() && styleLogicalWidth.isPositive()) || styleLogicalWidth.isIntrinsic()) {
+    if (!isLogicalWidthAuto()) {
         setLogicalWidth(convertStyleLogicalWidthToComputedWidth(styleLogicalWidth, containerWidthInInlineDirection));
     } else {
         // Subtract out any fixed margins from our available width for auto width tables.