Bug 1336510 - Part 3: Capture a strong reference to this in CompositorBridgeParent::FlushApzRepaints, r=kats

MozReview-Commit-ID: KdGBYEAC0dW

gfx/layers/ipc/CompositorBridgeParent.cpp

@@ -1319,8 +1319,9 @@ CompositorBridgeParent::FlushApzRepaints(const LayerTransactionParent* aLayerTre
     // use the compositor's root layer tree id.
     layersId = mRootLayerTreeID;
   }
+  RefPtr<CompositorBridgeParent> self = this;
   APZThreadUtils::RunOnControllerThread(NS_NewRunnableFunction([=] () {
-    mApzcTreeManager->FlushApzRepaints(layersId);
+    self->mApzcTreeManager->FlushApzRepaints(layersId);
   }));
 }