9970b94 Reland use a pbuffer surface when in the background (flutter/engine#27629)

engine-flutter-autoroll · engine-flutter-autoroll · commit d30ecf3a92cc · 2021-07-21T23:34:05.000Z
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
@@ -1 +1 @@
-6b633cbda5f46727b59561d42732322595e456aa
+9970b947935db588dd206c0835bcdbc96003c490
