Convert AudioBufferSource start and loop-comprehensive tests to testharness

third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-loop-comprehensive-expected.txt

-Tests AudioBufferSourceNode looping with a variety of loop points.
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-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
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-PASS  loop whole buffer by default with loopStart == loopEnd == 0.
-PASS  loop whole buffer explicitly.
-PASS  loop from middle to end of buffer.
-PASS  loop from start to middle of buffer.
-PASS  loop from 4 -> 6.
-PASS  loop from 3 -> 7.
-PASS  loop from 4 -> 6 with playbackRate of 0.5.
-PASS  loop from 4 -> 6 with playbackRate of 1.5.
-PASS  loop from 2 -> 5 with offset 6.
-PASS  loop from 3 -> 6 with offset 1.
-PASS  loop from 3 -> 6 with offset 4.
-PASS  illegal playbackRate of 47 greater than loop length.
-PASS  illegal loop: loopStartFrame > loopEndFrame.
-PASS  illegal loop: loopStartFrame == loopEndFrame.
-PASS  illegal loop: loopStartFrame < 0.
-PASS  illegal loop: loopEndFrame > bufferLength.
-PASS  loop from 3 -> 6 with offset 1 for 20 frames.
-PASS  loop from 3 -> 8 with offset 1 for 3 frames.
-PASS  loop from 3 -> 8 with offset 7 for 3 frames.
-PASS successfullyParsed is true
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-TEST COMPLETE
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