Raster PictureLayerTiling with fractional translation

cc/layers/picture_layer.h

Index: cc/layers/picture_layer.h
diff --git a/cc/layers/picture_layer.h b/cc/layers/picture_layer.h
index 27335e7d395d15b937976fbba2412900702503de..5b8adf0bf575b136e116d0de33b7e58a29b2d882 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -28,6 +28,8 @@ class CC_EXPORT PictureLayer : public Layer {
     return picture_layer_inputs_.nearest_neighbor;
   }
 
+  void SetAllowTransformedRasterization(bool allowed);
+
   // Layer interface.
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void SetLayerTreeHost(LayerTreeHost* host) override;
@@ -57,6 +59,7 @@ class CC_EXPORT PictureLayer : public Layer {
 
     ContentLayerClient* client = nullptr;
     bool nearest_neighbor = false;
+    bool allow_transformed_rasterization = false;
     gfx::Rect recorded_viewport;
     scoped_refptr<DisplayItemList> display_list;
     size_t painter_reported_memory_usage = 0;
@@ -79,6 +82,8 @@ class CC_EXPORT PictureLayer : public Layer {
 
   void DropRecordingSourceContentIfInvalid();
 
+  bool ShouldUseTransformedRasterization() const;
+
   std::unique_ptr<RecordingSource> recording_source_;
   devtools_instrumentation::
       ScopedLayerObjectTracker instrumentation_object_tracker_;