offsetWidth on a table cell with fixed width is wrong

Source/core/rendering/RenderBox.cpp

Index: Source/core/rendering/RenderBox.cpp
diff --git a/Source/core/rendering/RenderBox.cpp b/Source/core/rendering/RenderBox.cpp
index aa800cb9f326b74814efcf646a7bf2e121bcd1d8..b0cd4d79b14e72a0f184c0a89d600c638d763fe2 100644
--- a/Source/core/rendering/RenderBox.cpp
+++ b/Source/core/rendering/RenderBox.cpp
@@ -420,7 +420,9 @@ bool RenderBox::requiresLayoutToDetermineWidth() const
         || style->boxSizing() == BORDER_BOX
         || !isRenderBlock()
         || !isRenderBlockFlow()
-        || isFlexItemIncludingDeprecated();
+        || isFlexItemIncludingDeprecated()
+        // TableCells can expand beyond a specified width.
+        || isTableCell();

[eae, 2013/09/27 19:56:56]

This should probably be isTableCell() && !table->isFixedLayout()

[Julien - ping for review, 2013/09/27 20:03:54]

I don't think so. Fixed table layout will also force the table cells' widths.

Note that I think that anything that depend on a cell's size should also trigger
a layout (table, row, row-group, column and column-group).

 }
 
 LayoutUnit RenderBox::fixedOffsetWidth() const