From a48a892756dff4986a2590293a8dcb4793fcf85f Mon Sep 17 00:00:00 2001
From: Kartikaya Gupta <kgupta@mozilla.com>
Date: Tue, 23 Jan 2018 17:20:23 -0500
Subject: [PATCH] Bug 1432635 - When advancing the test time, trigger a
 rendering flush to WR. r=sotaro

MozReview-Commit-ID: UtqGoOnobm

--HG--
extra : rebase_source : e3f3f135138014a4ed8c4bed23cca18c146995c1
---
 gfx/layers/ipc/CompositorBridgeParent.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gfx/layers/ipc/CompositorBridgeParent.cpp b/gfx/layers/ipc/CompositorBridgeParent.cpp
index 9bdc80e0bca9..e897c8ccf84e 100644
--- a/gfx/layers/ipc/CompositorBridgeParent.cpp
+++ b/gfx/layers/ipc/CompositorBridgeParent.cpp
@@ -1288,6 +1288,8 @@ bool
 CompositorBridgeParent::SetTestSampleTime(const uint64_t& aId,
                                           const TimeStamp& aTime)
 {
+  MOZ_ASSERT(CompositorThreadHolder::IsInCompositorThread());
+
   if (aTime.IsNull()) {
     return false;
   }
@@ -1295,6 +1297,11 @@ CompositorBridgeParent::SetTestSampleTime(const uint64_t& aId,
   mIsTesting = true;
   mTestTime = aTime;
 
+  if (mWrBridge) {
+    mWrBridge->FlushRendering(/*aIsSync*/ false);
+    return true;
+  }
+
   bool testComposite = mCompositionManager &&
                        mCompositorScheduler->NeedsComposite();