From 4803a952b96ec73b49099c928f2fa242606c7141 Mon Sep 17 00:00:00 2001
From: Matt Woodrow <mwoodrow@mozilla.com>
Date: Thu, 8 Mar 2018 20:00:50 +1300
Subject: [PATCH] Bug 1442915 - Don't use shadow visible region in
 DefaultComputeEffectiveTransforms since it might not be computed yet.
 r=mstange

---
 gfx/layers/Layers.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gfx/layers/Layers.cpp b/gfx/layers/Layers.cpp
index 52d50b9ad552..03d0526890d6 100644
--- a/gfx/layers/Layers.cpp
+++ b/gfx/layers/Layers.cpp
@@ -1314,7 +1314,7 @@ ContainerLayer::DefaultComputeEffectiveTransforms(const Matrix4x4& aTransformToS
     // transform while 2D is expected.
     idealTransform.ProjectTo2D();
   }
-  mUseIntermediateSurface = useIntermediateSurface && !GetLocalVisibleRegion().IsEmpty();
+  mUseIntermediateSurface = useIntermediateSurface;
   if (useIntermediateSurface) {
     ComputeEffectiveTransformsForChildren(Matrix4x4::From2D(residual));
   } else {