Convert video-prefixed* and video-preload* tests to testharness.js

third_party/WebKit/LayoutTests/media/video-preload-expected.txt

Index: third_party/WebKit/LayoutTests/media/video-preload-expected.txt
diff --git a/third_party/WebKit/LayoutTests/media/video-preload-expected.txt b/third_party/WebKit/LayoutTests/media/video-preload-expected.txt
deleted file mode 100644
index d78fe4c8184addff193a26392541c056c402a183..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/media/video-preload-expected.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-CONSOLE ERROR: line 116: Uncaught (in promise) AbortError: The play() request was interrupted by a new load request.
-CONSOLE ERROR: line 116: Uncaught (in promise) AbortError: The play() request was interrupted by a new load request.
-Test to see if media loads automatically when 'preload' is specified.
-
-
-Will load with 'preload=none', should not buffer automatically until 'play()' is called
-RUN(video.setAttribute('preload', 'none'))
-RUN(video.removeAttribute('autoplay'))
-EVENT(loadstart)
-did not buffer automatically OK
-RUN(video.play())
-EVENT(play)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-Will load with 'preload=none', should buffer automatically because 'load()' is called
-RUN(video.setAttribute('preload', 'none'))
-RUN(video.removeAttribute('autoplay'))
-RUN(video.load())
-EVENT(loadstart)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-Will load with 'preload=none', should buffer automatically because 'play()' is called
-RUN(video.setAttribute('preload', 'none'))
-RUN(video.removeAttribute('autoplay'))
-RUN(video.play())
-EVENT(play)
-EVENT(loadstart)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-Will load with 'preload=metadata', should buffer automatically 
-RUN(video.setAttribute('preload', 'metadata'))
-RUN(video.removeAttribute('autoplay'))
-RUN(video.load())
-EVENT(loadstart)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-Will load with 'preload=auto', should buffer automatically 
-RUN(video.setAttribute('preload', 'auto'))
-RUN(video.removeAttribute('autoplay'))
-RUN(video.load())
-EVENT(loadstart)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-Will load with 'preload=none', should buffer automatically because of 'autoplay'
-RUN(video.setAttribute('preload', 'none'))
-RUN(video.setAttribute('autoplay', 'true'))
-RUN(video.load())
-EVENT(loadstart)
-EVENT(loadedmetadata)
-buffered automatically OK
-
-END OF TEST
-