From f7202ace626339dbe5c130d9873c084064db2011 Mon Sep 17 00:00:00 2001
From: Justin Lebar <justin.lebar@gmail.com>
Date: Mon, 7 Jan 2013 09:44:22 +0100
Subject: [PATCH] Bug 827217 - Fix null-pointer crash with
 webgl.can-lose-context-in-foreground=false.

---
 dom/ipc/ProcessPriorityManager.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dom/ipc/ProcessPriorityManager.cpp b/dom/ipc/ProcessPriorityManager.cpp
index f4e8bb266f8..5e31b0452ed 100644
--- a/dom/ipc/ProcessPriorityManager.cpp
+++ b/dom/ipc/ProcessPriorityManager.cpp
@@ -430,6 +430,12 @@ InitProcessPriorityManager()
 bool
 CurrentProcessIsForeground()
 {
+  // The process priority manager is the only thing which changes our priority,
+  // so if the manager does not exist, then we must be in the foreground.
+  if (!sManager) {
+    return true;
+  }
+
   return sManager->GetPriority() >= PROCESS_PRIORITY_FOREGROUND;
 }