Revert "Fix timer-vs-loading.html"

This reverts commit d6f64062.

Reason for revert: probably causing timer-vs-loading.html failures on Mac:
https://ci.chromium.org/p/chromium/builders/ci/WebKit%20Mac10.13%20%28retina%29

Original change's description:
> Fix timer-vs-loading.html
> 
> This test is failing because flush() in hang-connection.php is sending
> the body data "a" to the browser. We should not send the body to run
> this test.
> 
> Bug: 7482
> Change-Id: I33c734f8fa58a7d85bb9d15b687455ee31e47c85
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1616871
> Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
> Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#660766}

TBR=horo@chromium.org,yhirano@chromium.org

Change-Id: Ic0216c75424e557df1eee7e52b7ef520874b80b3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 7482
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617645Reviewed-by: Collin Baker <collinbaker@chromium.org>
Commit-Queue: Collin Baker <collinbaker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660887}

third_party/blink/web_tests/NeverFixTests

@@ -286,6 +286,12 @@ crbug.com/753080 external/wpt/css/css-transforms/transform3d-sorting-006.html [
 crbug.com/753080 external/wpt/css/css-transforms/ttwf-css-3d-polygon-cycle-mismatch.html [ WontFix ]
 crbug.com/753080 external/wpt/css/css-transforms/ttwf-css-3d-polygon-cycle.html [ WontFix ]
 
+# We could fix this test for us and upstream it if the test shell user agent
+# would let us differentiate test_shell and WebKit DumpTreeNode.
+crbug.com/7482 [ Linux ] http/tests/misc/timer-vs-loading.html [ WontFix ]
+crbug.com/7482 [ Win ] http/tests/misc/timer-vs-loading.html [ WontFix ]
+crbug.com/7482 [ Mac ] http/tests/misc/timer-vs-loading.html [ WontFix ]
+
 # On Linux bold emoji are already supported.
 crbug.com/551843 [ Linux ] fast/text/fallback-traits-fixup.html [ WontFix ]
 crbug.com/551843 [ Linux ] fast/text/emoji-font-weight-mac.html [ WontFix ]

third_party/blink/web_tests/StaleTestExpectations

@@ -6,3 +6,8 @@
 #
 # Further documentation:
 # https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
+
+# We could fix this test for us and upstream it if the test shell user agent
+# would let us differentiate test_shell and WebKit DumpTreeNode.
+crbug.com/7482 [ Win Mac ] http/tests/misc/timer-vs-loading.html [ WontFix ]
+

third_party/blink/web_tests/http/tests/misc/resources/hang-connection-before-head.php

-<?php
-while (true) {
-    usleep(100000);
-}
-?>

third_party/blink/web_tests/http/tests/misc/timer-vs-loading.html

@@ -28,7 +28,7 @@
 
     <script>
     window.setTimeout("updateClock()", 100);
-    setTimeout('window.location = "resources/hang-connection-before-head.php"', 0);
+    setTimeout('window.location = "resources/hang-connection.php"', 0);
     </script>
 
 </body></html>