Revision 03b7db51f21ce2a157454020bb46301b825152a5 authored by Alex Moshchuk on 13 April 2018, 23:12:06 UTC, committed by Chromium WPT Sync on 13 April 2018, 23:12:06 UTC
Changes from first reland attempt at https://crrev.com/c/1011287: - fix an additional source of flakiness in ChromeOS login tests Changes from original attempt at https://crrev.com/c/999182: - fix flakiness in two additional ChromeOS login tests - fix CSP WPT tests to not depend on ordering between iframe's onload and postMessage - see https://crbug.com/832319. Previously, we sent the IPC to forward a cross-process postMessage immediately. This caused a behavioral difference from the same-process case where the postMessage is always scheduled. Namely, in a scenario like this: frame.postMessage(...); doSomethingThatSendsIPCsToFrame(frame); the IPCs from JS following the postMessage would've been ordered incorrectly, causing |frame| to see their side effects after the postMessage dispatch in the cross-process case, whereas they would be seen before the postMessage dispatch in the same-process case. One example of this is frame.focus(), and another is a frame element onload event (dispatched via FrameHostMsg_DispatchLoad) arriving after a postMessage dispatched from an inline script while the frame was still loading. To resolve these ordering concerns, this CL changes cross-process postMessage to do a PostTask on the sender side before sending the message to the browser process. This improves the current state of the world, but does not yet achieve a perfect match for the IPC ordering in the same-process case - see discussion on the bug. Bug: 828529 Tbr: dcheng@chromium.org Change-Id: If2cc6591db31471adff0d84ec0b689905e21cdf1 Reviewed-on: https://chromium-review.googlesource.com/999182 Reviewed-by: Xiyuan Xia <xiyuan@chromium.org> Reviewed-by: Daniel Cheng <dcheng@chromium.org> Commit-Queue: Alex Moshchuk <alexmos@chromium.org> Cr-Original-Original-Commit-Position: refs/heads/master@{#550284} Reviewed-on: https://chromium-review.googlesource.com/1011287 Cr-Original-Commit-Position: refs/heads/master@{#550621} Reviewed-on: https://chromium-review.googlesource.com/1012472 Cr-Commit-Position: refs/heads/master@{#550769}
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