Support subpixel values for text-shadow and box-shadow

LayoutTests/animations/interpolation/resources/interpolation-test.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 176 matching lines @@
     var testId = 'test-' + ++nextKeyframeId;
     cssText += '@' + webkitPrefix + 'keyframes ' + testId + ' { \n' +
         '  0% { ' + params.property + ': ' + params.from + '; }\n' +
         '  100% { ' + params.property + ': ' + params.to + '; }\n' +
         '}\n';
     return testId;
   }
 
   function normalizeValue(value) {
     return value.
-        // Round numbers to two decimal places.
+        // Round numbers to one decimal place. Our layout units are not exact

[dstockwell, 2013/11/27 23:49:31]

This shouldn't be necessary and isn't really appropriate. This is used in more
than the comparisons of just layout units.

Are the test results you are producing not stable?

[cbiesinger, 2013/12/18 02:09:12]

Reverted, see below.

+        // enough for any finer comparisons -- a difference of 1 LayoutUnit is
+        // 0.016 pixels.
         replace(/-?\d*\.\d+/g, function(n) {
-          return (parseFloat(n).toFixed(2)).
+          return (parseFloat(n).toFixed(1)).
               replace(/\.0*$/, '').
               replace(/^-0$/, '0');
         }).
         // Place whitespace between tokens.
         replace(/([\w\d.]+|[^\s])/g, '$1 ').
         replace(/\s+/g, ' ');
   }
 
   function createTargetContainer(id) {
     var targetContainer = document.createElement('div');
@@ skipping 156 matching lines @@
       finishTest();
     }, 10000);
   }
 
   window.runAsRefTest = runAsRefTest;
   window.testInterpolationAt = testInterpolationAt;
   window.assertInterpolation = assertInterpolation;
   window.convertToReference = convertToReference;
   window.afterTest = afterTest;
 })();