From 26e1f42909cdbcb282d7b9779043bea5e2d4225d Mon Sep 17 00:00:00 2001
From: Matt Woodrow <mwoodrow@mozilla.com>
Date: Thu, 24 Jul 2014 15:11:30 +1200
Subject: [PATCH] Bug 1031107 - Part 3: Skip display port visibility when
 computing plugin geometry. r=tn

---
 layout/base/nsDisplayList.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index ef7e9cc841c0..26aca68804ab 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -3890,6 +3890,9 @@ bool
 nsDisplayScrollLayer::ComputeVisibility(nsDisplayListBuilder* aBuilder,
                                         nsRegion* aVisibleRegion)
 {
+  if (aBuilder->IsForPluginGeometry()) {
+    return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion);
+  }
   nsRect displayport;
   bool usingDisplayPort =
     nsLayoutUtils::GetDisplayPort(mScrolledFrame->GetContent(), &displayport);