Shot in the dark to fix 581472

src/gpu/GrDrawingManager.cpp

Index: src/gpu/GrDrawingManager.cpp
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 90c77a5af0bc52f76395006f69c6006906a5cd85..9400bcb3871d4a20310c276bd428012823e2457c 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -67,7 +67,7 @@ void GrDrawingManager::reset() {
 }
 
 void GrDrawingManager::flush() {
-    if (fFlushing) {
+    if (fFlushing || this->abandoned()) {
         return;
     }
     fFlushing = true;