• brianderson's avatar
    Avoid deadlock with the UI thread and NPAPI in more cases · 2bcaa68b
    brianderson authored
    By doing the following:
    1) Avoid deferring commits until draw if not drawing soon.
    2) Don't send BeginMainFrame if swap throttling will block commit.
    
    As a side-effect, some of the changes will also help release
    the main thread sooner in some cases where we were holding on to
    it for too long.
    
    Additional scheduler deadlock tests added to verify existing
    and future operation.
    
    This should also enable us to more easily avoid unconditionally
    setting active_tree_needs_first_draw_ to false in
    SchedulerStateMachine::UpdateStateOnInvalidateOutputSurface
    in followup patches if we want to.
    
    BUG=479671, 477082
    
    Review URL: https://codereview.chromium.org/1139613003
    
    Cr-Commit-Position: refs/heads/master@{#330808}
    2bcaa68b
scheduler_settings.cc 2.21 KB