From 1a8e38dbb4e21a2c32beb8e02f6aa50295f596a9 Mon Sep 17 00:00:00 2001
From: Robert O'Callahan <robert@ocallahan.org>
Date: Wed, 17 Oct 2012 17:51:58 +1300
Subject: [PATCH] Bug 776505. Assert that nsDeviceContext is created on the
 main thread only. r=mats

--HG--
extra : rebase_source : fcda449b3bf25c9827c2fa2f000c20460819ce53
---
 gfx/src/nsDeviceContext.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gfx/src/nsDeviceContext.cpp b/gfx/src/nsDeviceContext.cpp
index 9c6846f16814..6660cb75e530 100644
--- a/gfx/src/nsDeviceContext.cpp
+++ b/gfx/src/nsDeviceContext.cpp
@@ -226,6 +226,7 @@ nsDeviceContext::nsDeviceContext()
       mPixelScale(1.0f), mPrintingScale(1.0f),
       mFontCache(nullptr)
 {
+    MOZ_ASSERT(NS_IsMainThread(), "nsDeviceContext created off main thread");
 }
 
 // Note: we use a bare pointer for mFontCache so that nsFontCache