Make SVG attribute interpolation test helper use testharness

third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-cx-interpolation-expected.txt

Index: third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-cx-interpolation-expected.txt
diff --git a/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-cx-interpolation-expected.txt b/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-cx-interpolation-expected.txt
deleted file mode 100644
index 58bfad20dcfd0f148b0bc1ac5ee6686cf7fc630d..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-cx-interpolation-expected.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-CONSOLE WARNING: SVG's SMIL animations (<animate>, <set>, etc.) are deprecated and will be removed. Please use CSS animations or Web animations instead.
-
-SVG SMIL:
-PASS: cx from [1] to [6] was [1] at 0
-PASS: cx from [1] to [6] was [2] at 0.2
-PASS: cx from [1] to [6] was [4] at 0.6
-PASS: cx from [1] to [6] was [6] at 1
-PASS: cy from [-1] to [-6] was [-1] at 0
-PASS: cy from [-1] to [-6] was [-2] at 0.2
-PASS: cy from [-1] to [-6] was [-4] at 0.6
-PASS: cy from [-1] to [-6] was [-6] at 1
-
-Web Animations API:
-PASS: cx from [1] to [6] was [-1] at -0.4
-PASS: cx from [1] to [6] was [1] at 0
-PASS: cx from [1] to [6] was [2] at 0.2
-PASS: cx from [1] to [6] was [4] at 0.6
-PASS: cx from [1] to [6] was [6] at 1
-PASS: cx from [1] to [6] was [8] at 1.4
-PASS: cy from [-1] to [-6] was [1] at -0.4
-PASS: cy from [-1] to [-6] was [-1] at 0
-PASS: cy from [-1] to [-6] was [-2] at 0.2
-PASS: cy from [-1] to [-6] was [-4] at 0.6
-PASS: cy from [-1] to [-6] was [-6] at 1
-PASS: cy from [-1] to [-6] was [-8] at 1.4
-