Change ahem font size in multicol-table-cell-vertical-align-001.xht

The Ahem font doesn't behave reliably at any given size. Multiples of
5px is supposed to work better. So use 20px instead of the default
(16px).

Bug: 788337
Change-Id: Ifd803008c6780a32fbeb5609faf23270ed4e8066
Reviewed-on: https://chromium-review.googlesource.com/811485
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522190}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2421,7 +2421,6 @@ crbug.com/788337 external/wpt/css/css-multicol/multicol-span-all-child-001.xht [
 crbug.com/788337 external/wpt/css/css-multicol/multicol-span-all-child-002.xht [ Failure ]
 crbug.com/788337 external/wpt/css/css-multicol/multicol-span-all-margin-nested-002.xht [ Failure ]
 crbug.com/788337 external/wpt/css/css-multicol/multicol-span-float-001.xht [ Failure ]
-crbug.com/788337 external/wpt/css/css-multicol/multicol-table-cell-vertical-align-001.xht [ Failure ]
 crbug.com/788337 external/wpt/css/css-multicol/multicol-width-ems-001.xht [ Failure ]
 crbug.com/788337 external/wpt/css/css-multicol/multicol-width-small-001.xht [ Failure ]
 crbug.com/788337 external/wpt/css/css-multicol/multicol-zero-height-001.xht [ Failure ]

third_party/WebKit/LayoutTests/external/wpt/css/css-multicol/multicol-table-cell-vertical-align-001.xht

@@ -10,13 +10,13 @@
 <style type="text/css"><![CDATA[
 div {
 	font-family: ahem;
-	font-size: 1em;
+	font-size: 20px;
 	line-height: 1em;
 	vertical-align: middle;
 	color: white;
 	background: #3366CC;
 	width: 6em;
-	height: 400px;
+	height: 20em;
 	display: table-cell;
 
 	column-count: 2;

third_party/WebKit/LayoutTests/external/wpt/css/css-multicol/multicol-table-cell-vertical-align-ref.xht

@@ -7,16 +7,16 @@
 <style type="text/css"><![CDATA[
 div {
 	font-family: ahem;
-	font-size: 1em;
+	font-size: 20px;
 	line-height: 1em;
 	vertical-align: middle;
 	color: white;
 	background: #3366CC;
 	width: 6em;
-	height: 8em;
+	height: 5.5em;
 }
 div+div {
-	margin-top: 10em;
+	margin-top: 9em;
 }
 ]]></style>
 </head>