Convert audiobuffersource-playbackrate to testharness

third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-expected.txt

Index: third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-expected.txt
diff --git a/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-expected.txt b/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-expected.txt
deleted file mode 100644
index 7799a2798ba3298a3ba3ff842503f0b5b9f22404..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-expected.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-Test if AudioBufferSourceNode.playbackRate can playback at different rates properly.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS SNR (103.85093009191795) is greater than or equal to 103.8508.
-PASS Maximum difference (in ulp units (16-bits)) (0.302734375) is less than or equal to 0.3028.
-PASS Number of differences between results (0) is less than or equal to 0.
-PASS SNR (103.8658027256771) is greater than or equal to 103.8657.
-PASS Maximum difference (in ulp units (16-bits)) (0.302734375) is less than or equal to 0.3029.
-PASS Number of differences between results (0) is less than or equal to 0.
-PASS SNR (103.81424611365298) is greater than or equal to 103.8141.
-PASS Maximum difference (in ulp units (16-bits)) (0.3046875) is less than or equal to 0.3047.
-PASS Number of differences between results (0) is less than or equal to 0.
-PASS SNR (103.68193381522602) is greater than or equal to 103.6818.
-PASS Maximum difference (in ulp units (16-bits)) (0.326171875) is less than or equal to 0.3262.
-PASS Number of differences between results (0) is less than or equal to 0.
-PASS SNR (103.1515278088242) is greater than or equal to 103.1514.
-PASS Maximum difference (in ulp units (16-bits)) (0.39453125) is less than or equal to 0.3946.
-PASS Number of differences between results (0) is less than or equal to 0.
-PASS successfullyParsed is true
-
-TEST COMPLETE
-