Enable editing/composition-underline-color.html on Win10

Update the baseline for Windows platform.

BUG=554893,825209

Change-Id: Iea34acced865105aabb11b1bce804c454bbd01f7
Reviewed-on: https://chromium-review.googlesource.com/979793Reviewed-by: Ryan Landay <rlanday@chromium.org>
Commit-Queue: Manuel Rego Casasnovas <rego@igalia.com>
Cr-Commit-Position: refs/heads/master@{#545796}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3403,7 +3403,6 @@ crbug.com/824955 external/wpt/css/css-font-loading/idlharness.https.html [ Pass
 crbug.com/825046 virtual/mouseevent_fractional/fast/events/mouse-event-buttons-attribute.html [ Pass Failure ]
 
 # Sheriff 2018-03-23
-crbug.com/825209 [ Win10 ] editing/composition-underline-color.html [ Failure ]
 crbug.com/825262 [ Win Mac Linux ] external/wpt/css/css-transitions/properties-value-001.html [ Pass Failure ]
 crbug.com/825262 [ Win Mac Linux ] external/wpt/css/css-transitions/properties-value-inherit-001.html [ Pass Failure ]
 crbug.com/825262 [ Win Mac Linux ] external/wpt/css/css-transitions/properties-value-inherit-002.html [ Pass Failure ]

third_party/WebKit/LayoutTests/platform/win/editing/composition-underline-color-expected.txt

@@ -6,7 +6,7 @@ layer at (0,0) size 800x200
       LayoutBlockFlow {P} at (0,0) size 784x40
         LayoutText {#text} at (0,0) size 770x39
           text run at (0,0) width 770: "This test checks that composition underline color uses the color of the text and is not always black. The test passes if you see the"
-          text run at (0,20) width 422: "word \"foobar\" in green with a composition underline in the same color."
+          text run at (0,20) width 421: "word \"foobar\" in green with a composition underline in the same color."
       LayoutBlockFlow {DIV} at (0,56) size 784x120 [color=#00FF00] [bgcolor=#000000]
         LayoutText {#text} at (50,50) size 40x19
           text run at (50,50) width 40: "foobar"

third_party/WebKit/LayoutTests/platform/win7/editing/composition-underline-color-expected.txt

-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x200
-  LayoutBlockFlow {HTML} at (0,0) size 800x200
-    LayoutBlockFlow {BODY} at (8,16) size 784x176
-      LayoutBlockFlow {P} at (0,0) size 784x40
-        LayoutText {#text} at (0,0) size 770x39
-          text run at (0,0) width 770: "This test checks that composition underline color uses the color of the text and is not always black. The test passes if you see the"
-          text run at (0,20) width 421: "word \"foobar\" in green with a composition underline in the same color."
-      LayoutBlockFlow {DIV} at (0,56) size 784x120 [color=#00FF00] [bgcolor=#000000]
-        LayoutText {#text} at (50,50) size 40x19
-          text run at (50,50) width 40: "foobar"
-caret: position 6 of child 0 {#text} of child 2 {DIV} of body