From 8f9549d2540daf393f0c6e99030d70662d699c5e Mon Sep 17 00:00:00 2001
From: Robert O'Callahan <robert@ocallahan.org>
Date: Sat, 2 Mar 2013 12:21:00 -0500
Subject: [PATCH] Bug 845526 - Limit complexity of invalid region in
 RemoveFrameFromLayerManager. r=mattwoodrow

---
 layout/base/FrameLayerBuilder.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/layout/base/FrameLayerBuilder.cpp b/layout/base/FrameLayerBuilder.cpp
index 8933ac0e44f5..d8cddf2f58d4 100644
--- a/layout/base/FrameLayerBuilder.cpp
+++ b/layout/base/FrameLayerBuilder.cpp
@@ -923,6 +923,7 @@ FrameLayerBuilder::RemoveFrameFromLayerManager(nsIFrame* aFrame,
         nsIntRegion rgn = old.ScaleToOutsidePixels(thebesData->mXScale, thebesData->mYScale, thebesData->mAppUnitsPerDevPixel);
         rgn.MoveBy(-GetTranslationForThebesLayer(t));
         thebesData->mRegionToInvalidate.Or(thebesData->mRegionToInvalidate, rgn);
+        thebesData->mRegionToInvalidate.SimplifyOutward(8);
       }
     }