Row with only spanning cells have a height of 0.

LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt

Index: LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt
diff --git a/LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt b/LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt
index ede658e1cad58292ee38d2c08dc7b37f60a2bc52..1cabc750c5f90abce33024448055236534ef613c 100644
--- a/LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt
+++ b/LayoutTests/platform/win/tables/mozilla_expected_failures/bugs/bug131020-3-expected.txt
@@ -1,8 +1,8 @@
-layer at (0,0) size 785x2340
+layer at (0,0) size 785x2362
   RenderView at (0,0) size 785x600
-layer at (0,0) size 785x2340
-  RenderBlock {HTML} at (0,0) size 785x2340
-    RenderBody {BODY} at (8,8) size 769x2324 [bgcolor=#19BCD2]
+layer at (0,0) size 785x2362
+  RenderBlock {HTML} at (0,0) size 785x2362
+    RenderBody {BODY} at (8,8) size 769x2346 [bgcolor=#19BCD2]
       RenderTable {TABLE} at (0,0) size 769x199 [bgcolor=#FFA500] [border: (1px outset #808080)]
         RenderTableSection {TBODY} at (1,1) size 767x197
           RenderTableRow {TR} at (0,0) size 767x158
@@ -140,16 +140,16 @@ layer at (0,0) size 785x2340
                                 text run at (2,2) width 20: "foo"
       RenderBlock (anonymous) at (0,1460) size 769x20
         RenderBR {BR} at (0,0) size 0x19
-      RenderTable {TABLE} at (0,1480) size 58x2 [border: (1px outset #808080)]
-        RenderTableSection {TBODY} at (1,1) size 56x0
-          RenderTableRow {TR} at (0,0) size 56x0
-            RenderTableCell {TD} at (0,-11) size 56x22 [border: (1px inset #808080)] [r=0 c=0 rs=2 cs=1]
+      RenderTable {TABLE} at (0,1480) size 58x24 [border: (1px outset #808080)]
+        RenderTableSection {TBODY} at (1,1) size 56x22
+          RenderTableRow {TR} at (0,0) size 56x11
+            RenderTableCell {TD} at (0,0) size 56x22 [border: (1px inset #808080)] [r=0 c=0 rs=2 cs=1]
               RenderText {#text} at (1,1) size 54x19
                 text run at (1,1) width 54: "blah blah"
-          RenderTableRow {TR} at (0,0) size 56x0
-      RenderBlock (anonymous) at (0,1482) size 769x20
+          RenderTableRow {TR} at (0,11) size 56x11
+      RenderBlock (anonymous) at (0,1504) size 769x20
         RenderBR {BR} at (0,0) size 0x19
-      RenderTable {TABLE} at (0,1502) size 602x364 [border: (1px outset #808080)]
+      RenderTable {TABLE} at (0,1524) size 602x364 [border: (1px outset #808080)]
         RenderTableSection {TBODY} at (1,1) size 600x362
           RenderTableRow {TR} at (0,0) size 600x0
             RenderTableCell {TD} at (0,0) size 512x362 [bgcolor=#FFFFFF] [border: (1px inset #808080)] [r=0 c=0 rs=2 cs=2]
@@ -158,9 +158,9 @@ layer at (0,0) size 785x2340
             RenderTableCell {TD} at (512,170) size 88x22 [border: (1px inset #808080)] [r=1 c=2 rs=1 cs=6]
               RenderText {#text} at (66,1) size 21x19
                 text run at (66,1) width 21: "xxx"
-      RenderBlock (anonymous) at (0,1866) size 769x20
+      RenderBlock (anonymous) at (0,1888) size 769x20
         RenderBR {BR} at (0,0) size 0x19
-      RenderTable {TABLE} at (10.50,1886) size 748x438 [bgcolor=#808080]
+      RenderTable {TABLE} at (10.50,1908) size 748x438 [bgcolor=#808080]
         RenderTableSection {TBODY} at (0,0) size 748x438
           RenderTableRow {TR} at (0,4) size 748x430
             RenderTableCell {TD} at (4,4) size 740x430 [r=0 c=0 rs=1 cs=1]