Convert audiobuffersource-channels to testharness

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

Index: third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-channels-expected.txt
diff --git a/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-channels-expected.txt b/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-channels-expected.txt
deleted file mode 100644
index 2263542c662830886c7cd2ac8caa460816a0309d..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-channels-expected.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-Tests that AudioBufferSourceNode validates AudioBuffer in .buffer attribute setter.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-PASS source.buffer = 57 threw exception TypeError: Failed to set the 'buffer' property on 'AudioBufferSourceNode': The provided value is not of type 'AudioBuffer'..
-PASS source.buffer = null threw exception TypeError: Failed to set the 'buffer' property on 'AudioBufferSourceNode': The provided value is not of type 'AudioBuffer'..
-PASS Mono buffer can be set.
-PASS Stereo buffer can be set.
-PASS 3 channels buffer can be set.
-PASS 4 channels buffer can be set.
-PASS 5 channels buffer can be set.
-PASS 6 channels buffer can be set.
-PASS 7 channels buffer can be set.
-PASS 8 channels buffer can be set.
-PASS 9 channels buffer can be set.
-PASS successfullyParsed is true
-
-TEST COMPLETE
-