First Implementation of Snapped Points

cc/layers/layer.cc

Index: cc/layers/layer.cc
diff --git a/cc/layers/layer.cc b/cc/layers/layer.cc
index f4ff01d5022577a6792c8fc3d353a3ad1d7b1bb8..9971493c7edf31c9d56184547857047d70ea7d08 100644
--- a/cc/layers/layer.cc
+++ b/cc/layers/layer.cc
@@ -310,6 +310,15 @@ void Layer::SetBounds(const gfx::Size& size) {
   SetNeedsCommit();
 }
 
+void Layer::SetScrollSnapOffsets(const SnapPointList& offsets) {
+  DCHECK(IsPropertyChangeAllowed());
+  if (inputs_.snap_offsets == offsets)
+    return;
+  inputs_.snap_offsets = offsets;
+  SetPropertyTreesNeedRebuild();
+  SetNeedsCommit();
+}
+
 Layer* Layer::RootLayer() {
   Layer* layer = this;
   while (layer->parent())
@@ -1197,6 +1206,11 @@ void Layer::PushPropertiesTo(LayerImpl* layer) {
   layer->SetUpdateRect(inputs_.update_rect);
 
   layer->SetHasWillChangeTransformHint(has_will_change_transform_hint());
+  layer->SetScrollSnapOffsets(inputs_.snap_offsets);
+  /*for (SnapPoint point : inputs_.snap_offsets.horizontal) {
+    LOG(ERROR) << point.offset << " " << point.must_snap << " "
+      << point.is_start << " " << point.is_end;
+  }*/
   layer->SetNeedsPushProperties();
 
   // Reset any state that should be cleared for the next update.