Let AreVisibleResourcesReady return correct value for PictureImageLayerImpl

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index 49ef660a328d0567455dd346f7d9873e27876864..6393c643285f151fb33a08999e71086d0ff078eb 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -9,6 +9,7 @@
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
+#include "cc/test/impl_side_painting_settings.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkDevice.h"
@@ -53,13 +54,6 @@ class TestablePictureLayerImpl : public PictureLayerImpl {
   }
 };
 
-class ImplSidePaintingSettings : public LayerTreeSettings {
- public:
-  ImplSidePaintingSettings() {
-    impl_side_painting = true;
-  }
-};
-
 class TestablePicturePileImpl : public PicturePileImpl {
  public:
   static scoped_refptr<TestablePicturePileImpl> CreateFilledPile(