[Webkit-unassigned] [Bug 283546] New: [WebDriver] Wheel events might trigger assertions if the WebProcess takes too long to start

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=283546

            Bug ID: 283546
           Summary: [WebDriver] Wheel events might trigger assertions if
                    the WebProcess takes too long to start
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Process Model
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: lmoura at igalia.com
                CC: nham at apple.com

WebPageProxy::sendWheelEvent() accesses the WebProcessProxy Connection object directly in order to send the event message, bypassing `AuxiliaryWebProcess::sendMessage` safeguard that stores the pending messages until the process finishes launching:

This might trigger a `RELEASE_ASSERT` if the WebProcess takes too long to start, and we have wheel events right away, as is the case in the WPT WebDriver wheel tests (`test_null_response_value` test case), which are randomly asserting in my laptop.

imported/w3c/webdriver/tests/classic/perform_actions/wheel.py

Tentative patch incoming.

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