[Webkit-unassigned] [Bug 209741] New: REGRESSION(r258829): [CoordinatedGraphics] Web view not updated after cross site navigation with PSON enabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209741

            Bug ID: 209741
           Summary: REGRESSION(r258829): [CoordinatedGraphics] Web view
                    not updated after cross site navigation with PSON
                    enabled
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: Gtk, Regression
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bugs-noreply at webkitgtk.org, koivisto at iki.fi,
                    youennf at gmail.com

Since r258829, the drawing area proxy of a provisional page ignores all messages until the load is committed. This is causing 2 problems for coordinated graphics drawing area. When not in accelerated compositing mode, Update message is sent before the commit is loaded, and the web process keeps waiting for the DidUpdate response message forever. When accelerated compositing mode is forced, the EnterAcceleratedCompositing message is also sent before the load is committed and ignored, so the UI process doesn't know it's in accelerated mode.

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