Row with only spanning cells have a height of 0.

LayoutTests/platform/win/fast/table/007-expected.txt

Index: LayoutTests/platform/win/fast/table/007-expected.txt
diff --git a/LayoutTests/platform/win/fast/table/007-expected.txt b/LayoutTests/platform/win/fast/table/007-expected.txt
index 224ce4276b02d1c5b1118a84379581738ca66e3e..9f084ba8389b9531594f71accb1091185f60ef7a 100644
--- a/LayoutTests/platform/win/fast/table/007-expected.txt
+++ b/LayoutTests/platform/win/fast/table/007-expected.txt
@@ -3,8 +3,8 @@ layer 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
-      RenderTable {TABLE} at (0,0) size 524x94 [border: (1px outset #808080)]
-        RenderTableSection {TBODY} at (1,1) size 522x92
+      RenderTable {TABLE} at (0,0) size 524x105 [border: (1px outset #808080)]
+        RenderTableSection {TBODY} at (1,1) size 522x103
           RenderTableRow {TR} at (0,0) size 522x48
             RenderTableCell {TD} at (0,0) size 27x3 [border: (1px inset #808080)] [r=0 c=0 rs=3 cs=1]
               RenderImage {IMG} at (1,1) size 25x1
@@ -16,11 +16,11 @@ layer at (0,0) size 800x600
               RenderBlock {DIV} at (1,1) size 493x20
                 RenderText {#text} at (12,0) size 407x19
                   text run at (12,0) width 407: "Affordable, high-quality business services with unparalleled support."
-          RenderTableRow {TR} at (0,70) size 522x0
+          RenderTableRow {TR} at (0,70) size 522x11
             RenderTableCell {TD} at (27,70) size 495x22 [border: (1px inset #808080)] [r=2 c=1 rs=2 cs=1]
               RenderText {#text} at (1,1) size 397x19
                 text run at (1,1) width 397: "Wireless Services\x{2014}Take the Net with you when you\x{2019}re on the go"
-          RenderTableRow {TR} at (0,70) size 522x22
-            RenderTableCell {TD} at (0,70) size 522x22 [border: (1px inset #808080)] [r=3 c=0 rs=1 cs=2]
+          RenderTableRow {TR} at (0,81) size 522x22
+            RenderTableCell {TD} at (0,81) size 522x22 [border: (1px inset #808080)] [r=3 c=0 rs=1 cs=2]
               RenderText {#text} at (1,1) size 23x19
                 text run at (1,1) width 23: "goo"