Make SVG attribute interpolation test helper use testharness

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

Index: third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-dx-interpolation-expected.txt
diff --git a/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-dx-interpolation-expected.txt b/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-dx-interpolation-expected.txt
deleted file mode 100644
index a575df2aca7d706c10275fbdf3476d35e28cec67..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/svg-dx-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: dx from [1] to [6] was [1] at 0
-PASS: dx from [1] to [6] was [2] at 0.2
-PASS: dx from [1] to [6] was [4] at 0.6
-PASS: dx from [1] to [6] was [6] at 1
-PASS: dy from [1 -2] to [6 -12] was [1 -2] at 0
-PASS: dy from [1 -2] to [6 -12] was [2 -4] at 0.2
-PASS: dy from [1 -2] to [6 -12] was [4 -8] at 0.6
-PASS: dy from [1 -2] to [6 -12] was [6 -12] at 1
-
-Web Animations API:
-PASS: dx from [1] to [6] was [-1] at -0.4
-PASS: dx from [1] to [6] was [1] at 0
-PASS: dx from [1] to [6] was [2] at 0.2
-PASS: dx from [1] to [6] was [4] at 0.6
-PASS: dx from [1] to [6] was [6] at 1
-PASS: dx from [1] to [6] was [8] at 1.4
-PASS: dy from [1 -2] to [6 -12] was [-1 2] at -0.4
-PASS: dy from [1 -2] to [6 -12] was [1 -2] at 0
-PASS: dy from [1 -2] to [6 -12] was [2 -4] at 0.2
-PASS: dy from [1 -2] to [6 -12] was [4 -8] at 0.6
-PASS: dy from [1 -2] to [6 -12] was [6 -12] at 1
-PASS: dy from [1 -2] to [6 -12] was [8 -16] at 1.4
-