From f5ca558b7a3957e472ea4a50dc61889079901772 Mon Sep 17 00:00:00 2001
From: David Rajchenbach-Teller <dteller@mozilla.com>
Date: Mon, 1 Jul 2013 09:55:04 -0400
Subject: [PATCH] Bug 887288 - Make nsDOMMemoryFileDataOwnerMemoryReporter
 thread-safe. r=khuey

---
 content/base/src/nsDOMFile.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/content/base/src/nsDOMFile.cpp b/content/base/src/nsDOMFile.cpp
index 583dbc2edcf4..65ad7537f015 100644
--- a/content/base/src/nsDOMFile.cpp
+++ b/content/base/src/nsDOMFile.cpp
@@ -706,12 +706,13 @@ class nsDOMMemoryFileDataOwnerMemoryReporter MOZ_FINAL
   }
 };
 
-NS_IMPL_ISUPPORTS1(nsDOMMemoryFileDataOwnerMemoryReporter,
+NS_IMPL_THREADSAFE_ISUPPORTS1(nsDOMMemoryFileDataOwnerMemoryReporter,
                    nsIMemoryMultiReporter)
 
 /* static */ void
 nsDOMMemoryFile::DataOwner::EnsureMemoryReporterRegistered()
 {
+  sDataOwnerMutex.AssertCurrentThreadOwns();
   if (sMemoryReporterRegistered) {
     return;
   }