From c6ebea64bf5443f600995f6500488bc2623749fc Mon Sep 17 00:00:00 2001
From: Matt Woodrow <mwoodrow@mozilla.com>
Date: Fri, 5 Oct 2018 02:01:20 +0000
Subject: [PATCH] Bug 1496430 - Check GL context for RenderCompositorANGLE.
 r=sotaro

MozReview-Commit-ID: 7ncgoJOpZs9

Differential Revision: https://phabricator.services.mozilla.com/D7804

--HG--
extra : moz-landing-system : lando
---
 gfx/webrender_bindings/RenderCompositorANGLE.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gfx/webrender_bindings/RenderCompositorANGLE.cpp b/gfx/webrender_bindings/RenderCompositorANGLE.cpp
index 20d0dabd44f7..cdee866a41ed 100644
--- a/gfx/webrender_bindings/RenderCompositorANGLE.cpp
+++ b/gfx/webrender_bindings/RenderCompositorANGLE.cpp
@@ -111,7 +111,10 @@ RenderCompositorANGLE::Initialize()
   if (!SutdownEGLLibraryIfNecessary()) {
     return false;
   }
-  RenderThread::Get()->SharedGL();
+  if (!RenderThread::Get()->SharedGL()) {
+    gfxCriticalNote << "[WR] failed to get shared GL context.";
+    return false;
+  }
 
   mDevice = GetDeviceOfEGLDisplay();