suppress test failures

Changes to Skia polynomial evaluation caused a slight difference
in cubic path measure, causing a few tests to fail. Suppressing
these failures until they can be rebaselined.

R=fmalita@chromium.org
BUG=581661

Review URL: https://codereview.chromium.org/1645483002

Cr-Commit-Position: refs/heads/master@{#371782}

third_party/WebKit/LayoutTests/TestExpectations

@@ -359,6 +359,10 @@ crbug.com/552433 [ Linux Mac Win10 Win7 ] svg/dom/length-list-parser.html [ Fail
 crbug.com/552433 [ Linux Mac Win10 Win7 ] svg/transforms/text-with-pattern-with-svg-transform.svg [ Failure Pass ]
 crbug.com/552433 [ Linux Mac Win10 Win7 ] svg/hixie/perf/006.xml [ Failure Pass ]
 
+crbug.com/581661 svg/hixie/perf/002.xml [ NeedsManualRebaseline ]
+crbug.com/581661 svg/batik/text/textOnPath.svg [ NeedsManualRebaseline ]
+crbug.com/581661 svg/hixie/perf/001.xml [ NeedsManualRebaseline ]
+
 crbug.com/441840 [ Mac ] cssom/ahem-ex-units.html [ Failure ]
 
 crbug.com/530044 transforms/2d/transform-borderbox.html [ NeedsManualRebaseline ]