From d4e5ed21677835adae94c8265662fbb8532ed7f3 Mon Sep 17 00:00:00 2001
From: Bas Schouten <bschouten@mozilla.com>
Date: Tue, 4 Jan 2011 02:37:13 +0100
Subject: [PATCH] Bug 622678: Empty valid region when resources are cleared.
 r=roc a=blocking-betan

---
 gfx/layers/d3d9/ThebesLayerD3D9.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gfx/layers/d3d9/ThebesLayerD3D9.cpp b/gfx/layers/d3d9/ThebesLayerD3D9.cpp
index cb5ec0f82841..89d8f015d896 100644
--- a/gfx/layers/d3d9/ThebesLayerD3D9.cpp
+++ b/gfx/layers/d3d9/ThebesLayerD3D9.cpp
@@ -258,6 +258,7 @@ ThebesLayerD3D9::CleanResources()
 {
   mTexture = nsnull;
   mTextureOnWhite = nsnull;
+  mValidRegion.SetEmpty();
 }
 
 void