Let AreVisibleResourcesReady return correct value for PictureImageLayerImpl

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index 9e54f43051fa7b337bc212c492b12bf8b6cf31c1..49a862f3695b43321b749e493cbf27a5f90cc273 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -75,10 +75,12 @@ class CC_EXPORT PictureLayerImpl : public LayerImpl,
   void RemoveTiling(float contents_scale);
   void SyncFromActiveLayer(const PictureLayerImpl* other);
   void ManageTilings(bool animating_transform_to_screen);
+  virtual bool ShouldAdjustRasterScale(
+      bool animating_transform_to_screen) const;
   virtual void CalculateRasterContentsScale(
       bool animating_transform_to_screen,
       float* raster_contents_scale,
-      float* low_res_raster_contents_scale);
+      float* low_res_raster_contents_scale) const;
   void CleanUpTilingsOnActiveLayer(
       std::vector<PictureLayerTiling*> used_tilings);
   PictureLayerImpl* PendingTwin() const;
@@ -106,6 +108,8 @@ class CC_EXPORT PictureLayerImpl : public LayerImpl,
   float raster_page_scale_;
   float raster_device_scale_;
   float raster_source_scale_;
+  float raster_contents_scale_;
+  float low_res_raster_contents_scale_;
   bool raster_source_scale_was_animating_;
   bool is_using_lcd_text_;