Fix source of slight test variation. (Bug 759755, patch 1)

layout/reftests/font-inflation/threshold-scope-cell-1-ref.html

@@ -3,6 +3,8 @@
 <style>
 body { font-size: 12px; width: 600px; }
 p { margin: 0 }
+table { border-spacing: 0 } /* FIXME: why is this needed?  Something to do with ComputeDescendantWidth in nsFontInflationData? */
+td { padding: 0 }
 </style>
 <!--
 In a 600px container, the minimum font size at 15em per line is 40px.

layout/reftests/font-inflation/threshold-scope-cell-1.html

@@ -3,6 +3,8 @@
 <style>
 body { font-size: 12px; width: 600px; }
 p { margin: 0 }
+table { border-spacing: 0 } /* FIXME: why is this needed?  Something to do with ComputeDescendantWidth in nsFontInflationData? */
+td { padding: 0 }
 </style>
 <!--
 In a 600px container, the minimum font size at 15em per line is 40px.

layout/reftests/font-inflation/threshold-scope-cell-2-ref.html

@@ -3,6 +3,8 @@
 <style>
 body { font-size: 12px; width: 600px; }
 p { margin: 0 }
+table { border-spacing: 0 } /* FIXME: why is this needed?  Something to do with ComputeDescendantWidth in nsFontInflationData? */
+td { padding: 0 }
 </style>
 <!--
 In a 600px container, the minimum font size at 15em per line is 40px.

layout/reftests/font-inflation/threshold-scope-cell-2.html

@@ -3,6 +3,8 @@
 <style>
 body { font-size: 12px; width: 600px; }
 p { margin: 0 }
+table { border-spacing: 0 } /* FIXME: why is this needed?  Something to do with ComputeDescendantWidth in nsFontInflationData? */
+td { padding: 0 }
 </style>
 <!--
 In a 600px container, the minimum font size at 15em per line is 40px.
@@ -11,13 +13,12 @@ This means we map 0px-60px into 40px-60px, so 12px gets mapped to 44px.
 Further, with a lineThreshold of 100, we need 50 characters of 12px
 text to meet the line threshold.
 -->
-<table><tr><td>123456789
+<table><tr><td style="width: 600px">123456789
 123456789
 123456789
 123456789
 123456789</td></tr>
-<!-- FIXME: Why is it a little off when this width is on the first cell? -->
-<tr><td style="width: 600px">123456789
+<tr><td>123456789
 123456789
 123456789
 123456789