Support subpixel values for text-shadow and box-shadow

LayoutTests/animations/resources/animation-test-helpers.js

Index: LayoutTests/animations/resources/animation-test-helpers.js
diff --git a/LayoutTests/animations/resources/animation-test-helpers.js b/LayoutTests/animations/resources/animation-test-helpers.js
index 271297b2f49f2f455de08f04e0cefeb0104e47b4..d7f6070712935f98ba6526e3969e7db75ba4ceda 100644
--- a/LayoutTests/animations/resources/animation-test-helpers.js
+++ b/LayoutTests/animations/resources/animation-test-helpers.js
@@ -310,8 +310,8 @@ function checkExpectedTransitionValue(expected, index)
                     // arbitrarily pick shadow-x and shadow-y
                     if (property == 'box-shadow' || property == 'text-shadow') {
                       var text = computedStyle[i].cssText;
-                      // Shadow cssText looks like "rgb(0, 0, 255) 0px -3px 10px 0px"
-                      var shadowPositionRegExp = /\)\s*(-?\d+)px\s*(-?\d+)px/;
+                      // Shadow cssText looks like "rgb(0, 0, 255) 0px -3px 10px 0px" and can be fractional.
+                      var shadowPositionRegExp = /\)\s*(-?[\d.]+)px\s*(-?[\d.]+)px/;
                       var match = shadowPositionRegExp.exec(text);
                       var shadowXY = [parseInt(match[1]), parseInt(match[2])];
                       values.push(shadowXY[0]);