From bb9d9e645b2d64c44eafa04646e79df2476a6cd5 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <nnethercote@mozilla.com>
Date: Tue, 18 Nov 2014 00:29:12 -0800
Subject: [PATCH] Bug 1100205 - Zero ScreenDetails outparam in
 RecvScreenForBrowser() so Valgrind doesn't complain. r=mconley.

--HG--
extra : rebase_source : 6420a5d78ed1d28d157ab10db14951fb14cc523a
---
 dom/ipc/ScreenManagerParent.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dom/ipc/ScreenManagerParent.cpp b/dom/ipc/ScreenManagerParent.cpp
index a95b676ee4b0..cc460ef4ac20 100644
--- a/dom/ipc/ScreenManagerParent.cpp
+++ b/dom/ipc/ScreenManagerParent.cpp
@@ -121,6 +121,11 @@ ScreenManagerParent::RecvScreenForBrowser(PBrowserParent* aBrowser,
                                           bool* aSuccess)
 {
   *aSuccess = false;
+#ifdef MOZ_VALGRIND
+  // Zero this so that Valgrind doesn't complain when we send it to another
+  // process.
+  memset(aRetVal, 0, sizeof(ScreenDetails));
+#endif
 
   // Find the mWidget associated with the tabparent, and then return
   // the nsIScreen it's on.