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 0860ff939588b9ff43c632c11b7ed5233de549ed..d4645a06ffdf0a5f4e28d19a77f9593afe91b5c5 100644
--- a/LayoutTests/animations/resources/animation-test-helpers.js
+++ b/LayoutTests/animations/resources/animation-test-helpers.js
@@ -384,8 +384,8 @@ 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]);