From 5bbd89905f5e96bac8485eef8e77a051b2d52083 Mon Sep 17 00:00:00 2001
From: Barret Rennie <barret@brennie.ca>
Date: Thu, 30 May 2019 21:08:01 +0000
Subject: [PATCH] Bug 1555379 - Record content paint times for WebRender r=kats

The WebRenderBridgeChild now records whether or not it was painting content
while sending display lists to the WebRenderBridgeParent, allowing for
composition times to be recorded for WebRender.

Differential Revision: https://phabricator.services.mozilla.com/D32229

--HG--
extra : moz-landing-system : lando
---
 gfx/layers/wr/WebRenderBridgeParent.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gfx/layers/wr/WebRenderBridgeParent.cpp b/gfx/layers/wr/WebRenderBridgeParent.cpp
index d6ccb2ff18cb..05b37d9f73d9 100644
--- a/gfx/layers/wr/WebRenderBridgeParent.cpp
+++ b/gfx/layers/wr/WebRenderBridgeParent.cpp
@@ -1076,6 +1076,11 @@ mozilla::ipc::IPCResult WebRenderBridgeParent::RecvSetDisplayList(
                                            mChildLayersObserverEpoch, true);
   }
 
+  if (!IsRootWebRenderBridgeParent()) {
+    aPayloads.AppendElement(
+        CompositionPayload{CompositionPayloadType::eContentPaint, aFwdTime});
+  }
+
   HoldPendingTransactionId(wrEpoch, aTransactionId, aContainsSVGGroup, aVsyncId,
                            aVsyncStartTime, aRefreshStartTime, aTxnStartTime,
                            aTxnURL, aFwdTime, mIsFirstPaint,