Add fuzzy matching to transform-input-015.html

external/wpt/css/css-transforms/transform-input-015.html is failing due
to anti-aliasing. Fix this issue by using fuzzy matching on 2 pixels.

Bug: 1051143
Change-Id: Ie60f02f95bcdaee7c26884c1dd2ec128df60f014
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2844766
Reviewed-by: Olga Gerchikov <gerchiko@microsoft.com>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Sahir Vellani <sahir.vellani@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#875355}

css/css-transforms/transform-input-015.html

@@ -13,6 +13,7 @@
     difficult to construct a correct reference file for more complex
     transforms.)'>
     <link rel="match" href="transform-input-015-ref.html">
+    <meta name=fuzzy content="0-1;0-2">
     <style>
       input {
         /* Margin to avoid overlap of translated inputs */