Row with only spanning cells have a height of 0.

LayoutTests/tables/mozilla/bugs/bug13169-expected.txt

Index: LayoutTests/tables/mozilla/bugs/bug13169-expected.txt
diff --git a/LayoutTests/tables/mozilla/bugs/bug13169-expected.txt b/LayoutTests/tables/mozilla/bugs/bug13169-expected.txt
index aed0321ff6fbdc9e58e780f02d88bb700bae5eb1..b0f3a2510a384c1fbb3661a1c4e4ab52a3e571f9 100644
--- a/LayoutTests/tables/mozilla/bugs/bug13169-expected.txt
+++ b/LayoutTests/tables/mozilla/bugs/bug13169-expected.txt
@@ -1,27 +1,27 @@
-layer at (0,0) size 785x926
-  RenderView at (0,0) size 785x600
-layer at (0,0) size 785x926
-  RenderBlock {HTML} at (0,0) size 785x926
-    RenderBody {BODY} at (8,8) size 769x910 [bgcolor=#C0C0C0]
-      RenderTable {TABLE} at (0,0) size 672x454 [border: (3px outset #808080)]
-        RenderTableSection {TBODY} at (3,3) size 666x448
-          RenderTableRow {TR} at (0,0) size 666x224
-            RenderTableCell {TD} at (0,110) size 333x4 [border: (1px inset #808080)] [r=0 c=0 rs=1 cs=1]
-            RenderTableCell {TD} at (333,0) size 333x224 [border: (1px inset #808080)] [r=0 c=1 rs=2 cs=1]
+layer at (0,0) size 800x600
+  RenderView at (0,0) size 800x600
+layer at (0,0) size 800x600
+  RenderBlock {HTML} at (0,0) size 800x600
+    RenderBody {BODY} at (8,8) size 784x584 [bgcolor=#C0C0C0]
+      RenderTable {TABLE} at (0,0) size 672x237 [border: (3px outset #808080)]
+        RenderTableSection {TBODY} at (3,3) size 666x231
+          RenderTableRow {TR} at (0,0) size 666x7
+            RenderTableCell {TD} at (0,1) size 333x4 [border: (1px inset #808080)] [r=0 c=0 rs=1 cs=1]
+            RenderTableCell {TD} at (333,1) size 333x224 [border: (1px inset #808080)] [r=0 c=1 rs=2 cs=1]
               RenderImage {IMG} at (2,2) size 329x220
-          RenderTableRow {TR} at (0,224) size 666x0
-            RenderTableCell {TD} at (0,224) size 333x224 [border: (1px inset #808080)] [r=1 c=0 rs=2 cs=1]
+          RenderTableRow {TR} at (0,7) size 666x219
+            RenderTableCell {TD} at (0,7) size 333x224 [border: (1px inset #808080)] [r=1 c=0 rs=2 cs=1]
               RenderImage {IMG} at (2,2) size 329x220
-          RenderTableRow {TR} at (0,224) size 666x224
-            RenderTableCell {TD} at (333,334) size 333x4 [border: (1px inset #808080)] [r=2 c=1 rs=1 cs=1]
-      RenderTable {TABLE} at (0,454) size 675x456 [border: (3px outset #808080)]
-        RenderTableSection {TBODY} at (3,3) size 669x450
-          RenderTableRow {TR} at (0,1) size 669x223
-            RenderTableCell {TD} at (1,110) size 333x4 [border: (1px inset #808080)] [r=0 c=0 rs=1 cs=1]
-            RenderTableCell {TD} at (335,1) size 333x224 [border: (1px inset #808080)] [r=0 c=1 rs=2 cs=1]
+          RenderTableRow {TR} at (0,226) size 666x5
+            RenderTableCell {TD} at (333,226) size 333x4 [border: (1px inset #808080)] [r=2 c=1 rs=1 cs=1]
+      RenderTable {TABLE} at (0,237) size 675x240 [border: (3px outset #808080)]
+        RenderTableSection {TBODY} at (3,3) size 669x234
+          RenderTableRow {TR} at (0,1) size 669x7
+            RenderTableCell {TD} at (1,2) size 333x4 [border: (1px inset #808080)] [r=0 c=0 rs=1 cs=1]
+            RenderTableCell {TD} at (335,2) size 333x224 [border: (1px inset #808080)] [r=0 c=1 rs=2 cs=1]
               RenderImage {IMG} at (2,2) size 329x220
-          RenderTableRow {TR} at (0,225) size 669x0
-            RenderTableCell {TD} at (1,225) size 333x224 [border: (1px inset #808080)] [r=1 c=0 rs=2 cs=1]
+          RenderTableRow {TR} at (0,9) size 669x218
+            RenderTableCell {TD} at (1,9) size 333x224 [border: (1px inset #808080)] [r=1 c=0 rs=2 cs=1]
               RenderImage {IMG} at (2,2) size 329x220
-          RenderTableRow {TR} at (0,226) size 669x223
-            RenderTableCell {TD} at (335,335) size 333x4 [border: (1px inset #808080)] [r=2 c=1 rs=1 cs=1]
+          RenderTableRow {TR} at (0,228) size 669x5
+            RenderTableCell {TD} at (335,228) size 333x4 [border: (1px inset #808080)] [r=2 c=1 rs=1 cs=1]