From ef8705a2a757ec398c8333c69c8a0d0c287a4a14 Mon Sep 17 00:00:00 2001
From: Jonathan Watt <jwatt@jwatt.org>
Date: Fri, 7 Mar 2014 13:21:46 +0000
Subject: [PATCH] Bug 980428 - Add a DEBUG-only DataSourceSurface dtor to
 assert that the surface has not been left mapped. r=Bas

---
 gfx/2d/2D.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gfx/2d/2D.h b/gfx/2d/2D.h
index 0db291fac88..6f509999cea 100644
--- a/gfx/2d/2D.h
+++ b/gfx/2d/2D.h
@@ -347,6 +347,13 @@ public:
   {
   }
 
+#ifdef DEBUG
+  virtual ~DataSourceSurface()
+  {
+    MOZ_ASSERT(!mIsMapped, "Someone forgot to call Unmap()");
+  }
+#endif
+
   struct MappedSurface {
     uint8_t *mData;
     int32_t mStride;