| Index: ui/views/widget/widget_hwnd_utils.cc
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| diff --git a/ui/views/widget/widget_hwnd_utils.cc b/ui/views/widget/widget_hwnd_utils.cc
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| index a68b861b4f35884f25ae65424613a1c96c5cb7d8..ca561b6d6dc106cce9c94b5c2e38298156845633 100644
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| --- a/ui/views/widget/widget_hwnd_utils.cc
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| +++ b/ui/views/widget/widget_hwnd_utils.cc
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| @@ -63,8 +63,11 @@ void CalculateWindowStylesFromInitParams(
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|    //    style.
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|    // 5- When the window is created but before it is presented, call
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|    //    DwmExtendFrameIntoClientArea passing -1 as the margins.
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| +  // We also set the WS_EX_COMPOSITED style for software composited translucent
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| +  // windows, which ensures that they are updated via the layered window code
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| +  // path in the software compositor.
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|    if (params.opacity == Widget::InitParams::TRANSLUCENT_WINDOW) {
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| -    if (ui::win::IsAeroGlassEnabled())
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| +    if (ui::win::IsAeroGlassEnabled() || params.force_software_compositing)
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|        *ex_style |= WS_EX_COMPOSITED;
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|    }
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|    if (params.shadow_type == Widget::InitParams::SHADOW_TYPE_DROP) {
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| 
 |