Revert of [SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html

Index: third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html
index 1d25402fafae9e85a3ef328770ca1e1f9eb12e68..ce6044796f26c2f5ac54c0e8e7d9c655fd95ff53 100644
--- a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html
+++ b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-append-buffer.html
@@ -550,22 +550,6 @@
               test.done();
           }, 'Test appending null.');
 
-          if (window.SharedArrayBuffer) {
-              mediasource_test(function(test, mediaElement, mediaSource)
-              {
-                  var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.VIDEO_ONLY_TYPE);
-
-                  test.expectEvent(sourceBuffer, 'updatestart', 'Append started.');
-                  test.expectEvent(sourceBuffer, 'update', 'Append success.');
-                  test.expectEvent(sourceBuffer, 'updateend', 'Append ended.');
-
-                  assert_throws( { name: 'TypeError'} ,
-                      function() { sourceBuffer.appendBuffer(new Uint8Array(new SharedArrayBuffer(16))); },
-                      'appendBuffer() of SharedArrayBuffer view throws an exception.');
-                  test.done();
-              }, 'Test appending SharedArrayBuffer view.');
-          }
-
           mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
           {
               mediaSource.removeSourceBuffer(sourceBuffer);