From 6c36181d45842bb74c2585e5453c35f5650d9c9d Mon Sep 17 00:00:00 2001
From: sotaro <sotaro.ikeda.g@gmail.com>
Date: Tue, 10 Dec 2019 01:10:23 +0000
Subject: [PATCH] Bug 1601862 - Suppress false alarm log r=nical

Differential Revision: https://phabricator.services.mozilla.com/D56150

--HG--
extra : moz-landing-system : lando
---
 gfx/webrender_bindings/RenderCompositorANGLE.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gfx/webrender_bindings/RenderCompositorANGLE.cpp b/gfx/webrender_bindings/RenderCompositorANGLE.cpp
index 602fbbfb9a08..5cb28aa83d1e 100644
--- a/gfx/webrender_bindings/RenderCompositorANGLE.cpp
+++ b/gfx/webrender_bindings/RenderCompositorANGLE.cpp
@@ -279,7 +279,12 @@ void RenderCompositorANGLE::CreateSwapChainForDCompIfPossible(
 
   HWND hwnd = mWidget->AsWindows()->GetCompositorHwnd();
   if (!hwnd) {
-    gfxCriticalNote << "Compositor window was not created ";
+    // When DirectComposition or DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL is used,
+    // compositor window needs to exist.
+    if (gfx::gfxVars::UseWebRenderDCompWin() ||
+        gfx::gfxVars::UseWebRenderFlipSequentialWin()) {
+      gfxCriticalNote << "Compositor window was not created";
+    }
     return;
   }