cc: Get rid of LayerTreeHost::output_surface_lost_ state.

blimp/client/feature/compositor/blimp_compositor.cc

Index: blimp/client/feature/compositor/blimp_compositor.cc
diff --git a/blimp/client/feature/compositor/blimp_compositor.cc b/blimp/client/feature/compositor/blimp_compositor.cc
index d1e3688c3e71289726a1b9a95ab33c98c3418a39..80888fc007263bf0af74982fb9938836ed11f17b 100644
--- a/blimp/client/feature/compositor/blimp_compositor.cc
+++ b/blimp/client/feature/compositor/blimp_compositor.cc
@@ -183,9 +183,7 @@ void BlimpCompositor::SetVisibleInternal(bool visible) {
     // If not visible, hide the compositor and have it drop it's output
     // surface.
     host_->SetVisible(false);
-    if (!host_->output_surface_lost()) {
-      host_->ReleaseOutputSurface();
-    }
+    host_->ReleaseOutputSurface();
   }
 }