[Webkit-unassigned] [Bug 112100] New: REGRESSION (r145277) causes chromium gpu throughput tests to fail

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=112100

           Summary: REGRESSION (r145277) causes chromium gpu throughput
                    tests to fail
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: shawnsingh at chromium.org
                CC: eric at webkit.org, abarth at webkit.org,
                    jamesr at chromium.org


bisected down to http://trac.webkit.org/changeset/145277.   Reverting locally also fixes the problem.

tl;dr - If I don't hear from you by Tuesday March 12 around lunch time (PST) I will go ahead and try reverting (as GPU Pixel Wrangler for chromium) to make the bots green.  If you feel confident that it can be fixed within 1 day, I can hold off on reverting, since there would be some lag anyway due to WK rolls.

After this rolled into chromium, the GPU throughput tests (part of performance_browser_tests) started failing.  Actually it probably has nothing to do with gpu / graphics, except that the test page being used is causing the problem.  The html just seems to hang halfway through loading, or maybe it just produces incomplete output, I can't tell.  Every once in a rare while, if I aggressively hold down the key shortcut to refresh for example, the page actually does load correctly.

Unfortunately, looking at some logs, it looks like some work is already going on very close to this code, for example http://trac.webkit.org/changeset/145464 by abarth at .

So my question is:  will this be safe to revert for now?  We should consider it more important to get the chromium gpu bots green than to avoid reverting here.

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