Bug 1151749 - "Win-Only: Disabled Hardware Acceleration + CSS 3D transform on canvas -> black artefacts on hover". r=nical

--HG--
extra : rebase_source : dd951364914eb22de13bfbe4b45e5b974528c705

gfx/layers/basic/BasicCompositor.cpp

@@ -455,6 +455,7 @@ BasicCompositor::DrawQuad(const gfx::Rect& aRect,
 #endif
         );
     if (NS_WARN_IF(!temp)) {
+      buffer->PopClip();
       return;
     }